We woke with a start when the bedroom door opened. Instead of mom standing there, like we would have expected, it was our sister Tammy! Neither of us had seen Tammy in more than a year. She was beautiful, as always, with dark wavy hair that fell to her shoulders, and green eyes. She wore blue jeans and a pale yellow halter top that stopped just above her navel. She stood about as tall as our mother, but with one noticeable difference: she had much larger breasts!

"Good mornin' sleepy heads!" She held her arms out, waiting for her hug. I jumped out of bed without thinking, and Tony was right behind me. It didn't occur to us that we were both naked. I ran up, threw my arms around her waist and hugged her tight. That's when I noticed that my penis was hard against her jeans! Apparently that's when Tony got the same clue, as we both jumped away like we had been scalded! We both jumped back onto the foot of the bed, and cupped our genitals with our hands.

"Oh! Mom was right! Your little dicks are so cute! Come on, let me see them again." She bent down to eye level and looked right at us. When she did, we could easily see her breasts hanging free beneath her top. Our eyes almost popped out of our heads! She stared back and forth into our eyes, and just stood there, bent over, with her breasts all but out! She swayed back and forth, and watched us as we became hypnotized by the sight.

The effect was immediate; we both began to grow. We each covered ourselves a little tighter. "Now, don't be shy! I want to see those pretty little peters!" I looked up and saw mom watching us from the doorway. I took that as consent, and nodded to Tony and pulled my hands away, showing Tammy my erection. Tony followed suit, and we sat there presenting for our sister. Her face was flushed and her smile was broad. She stared at us for a moment and bit her lip. "Stroke them for me!" She stood back up, untied her top at the neck, and let it drop- presenting us with two of the most beautiful breasts we'd ever seen!

We looked at each other, and grinned at the prize we had just been given. We started stroking our dicks and we watched as our sister finished taking off her top. She was evenly tanned without a line to be seen. Her breasts were large with stiff brown nipples- my heart skipped a beat and I squeezed my dick even harder as I stroked. She leaned forward and shook them at us. I heard Tony gasp at the sight. I gripped tighter and cupped my balls.

She pinched her nipples and shook her breasts; she was giving us quite a show! It didn't take long for that familiar burn to build in my balls. I stammered out, "I'm getting to cum, Tammy!"

"Me, too, sis," Tony croaked. "I'm gonna cum!"

Tammy grinned ear to ear. "Come on my horny little brothers- shoot your cum on my titties!"

We were happy to comply! I pushed my hips up and out, and Tony did the same. I don't know who came first, but we soon covered our sister's cleavage with sperm! She stared down at the dripping mess and smiled. She ran her hands through it and spread it all over and around her breasts, coating them in our ejaculate.

"Now who's going to help me clean these up?" She winked at us and shook her breasts again. We needed no further prompting and threw ourselves at her chest! I buried my face in her cleavage, licking and sucking away! We both licked at her breasts until the wet of our sperm was replaced with the wet of our saliva, then we sucked and sucked at those long, dark nipples. Tammy let out a moan as we fed.

"Mmmm. Did you like that?" We pulled back and looked at her directly. We both nodded. She bent and gave us both a quick peck on the lips.

Mom spoke up from the doorway. "Well, I'm glad to see you boys getting along with your sister!" She laughed and walked on into the room. She came up behind Tammy who turned her head up for a kiss. Mom gave her a soft kiss on the lips, which, if we hadn't just had the session that we did, would have seemed a little friendly. As it was, we hardly noticed; our heads were still spinning from the morning's events.

That's when she leaned down and stood cheek to cheek with Tammy, and reached around with both hands and cupped our sister's breasts! She held a devious grin as she gave them a squeeze and ran her fingers up and pinched and pulled Tammy's nipples. Tammy closed her eyes and leaned her head back into mom's chest. She let out a low moan before opening them again.

Mom let her breasts go and gave her a kiss on the cheek. "Well, boys, why don't you put on some shorts and go get some breakfast? We've got a big day ahead of us!"

As strange as it may seem, breakfast went more or less normally. Mom cooked bacon and eggs, and we all sat and talked about Tammy's life at school, how she was doing, and how it was all coming together for her. We talked and laughed as a family might, especially a family that's become as close as we had. After we all finished eating and our dishes were in the sink, we sat at the table together. Silence seemed to win out after all, and mom, dad, and Tammy all sat and exchanged glances.

Tony and I didn't know what to think, and looked back and forth between ourselves for several seconds. Finally, mom spoke, and broke the quiet that had dominated the room. She looked directly at Tony and me, as was everyone else at the table. She offered, "You two probably have a lot of questions for us."

I thought about it, as I had been thinking about it all through breakfast. I have to assume that Tony was thinking much the same thing, although we hadn't had a chance to speak about it. "Did Tammy learn the same way we did?"

Mom smirked, and dad laughed. Tammy's smile was unmistakable. "Yes, I suppose, she did."

Tammy cut in, getting mom off the hook a bit. "You see, guys, mom caught me peeping through the bathroom door while dad was in the shower. I was probably about your age, and I was curious about sex. Long story short, they decided it was best for me to learn from them than it was to learn from some inexperienced boy in the back seat of a car. I lost my virginity right back there in that bedroom." She finished her explanation with a satisfied grin.

Mom and dad looked at us for our reactions. It took a moment to process it all! I looked at Tammy, trying to imagine all this, and then I looked at dad (having imagined it) and then I looked at mom, first in confusion, and then finally understanding! Tony spoke before I did. "Oh, wow." His face was full of excitement and awe.

"Yeah," I added. "Wow."

"You see, fellas," dad offered, "your mother took control of her panties when she caught you two playing with them in the bathroom, she took control of your sister's when she caught her looking at my dick, and she took...well, I don't wear panties, but she took control of my underwear a long time ago!"

"Why don't we all go back to the bedroom and talk about this some more?" Mom held a sultry look in her eye. "I think these two have one more BIG lesson coming, don't you think?" The question was directed sidelong to dad and Tammy. I felt the blood run from my face, and my mouth went dry, as the implication of what she said sank in. I looked over at Tony and his jaw was slack, and sweat had appeared on his brow.

"Yeah, I think so," said dad. He grinned. "I think they're ready."

We followed them back to the bedroom like to little goslings to a pond. Neither of us could think, let alone speak. My shorts were tented, and I absently squeezed my penis through the material. Once in our parent's bedroom, mom stood beside the bed, dropped her robe and unfastened her bra. I was frozen to the spot, watching our mother undress, not just for one of our masturbation sessions, but to actually have sex with us!

Dad brought me back to reality by patting me on my shoulder. Shock gave way to earnest excitement, and I pulled off my shorts and shirt as quickly as I could! I realized as I got undressed, that dad and Tammy were doing the same. Tony followed suite almost immediately. Soon, everybody was nude, and Tony and I drank in the sight. Mom was the center of attention, and when she finally pulled off her panties, she walked over to Tony and pushed them up to his face.

"Now you get to smell mama's pussy, while your brother gets his first taste." She whispered in his ear, "don't worry little man, you're next!" Then she reached over, took me by the hand and led me to the bed. Mom crawled into the center of the mattress and spread her legs. She held out both arms, and called me in close. I was on my knees, and I stared at that beautiful pussy! Pink and wet with lips protruding through dark curly hair; it was the most beautiful thing I had ever seen!

"Bend down, Jack, and kiss your mommy's pussy," she purred. I needed no prompting, but I wasn't sure what to do! I just let instinct take over and planted a kiss straight on her lips. They were so soft, and I could taste their sweet oil on my mouth. I stuck out my tongue and began licking up and down her slit, scooping her juices into my mouth. Never had I tasted anything so sweet! I licked all around, through lips and mound and hair, enjoying every second, and getting my face coated in her wetness. It was intoxicating.

"You see this little button at the top, Jack?" She reached down between her legs and spread her pussy-lips. I nodded because I still couldn't speak. "Focus right there, baby. Lick mama up and down!" I did as I was directed, and it must have been exactly what she wanted, because she let out a quiet moan. "That's it, baby. Lick mama's clit!" Very soon she began to moan in earnest, and put her hand at the back of my head, holding me in place. I kept licking as straight and fast as I could. My chin and chest were slathered in her juice.

"Oh, baby! That's it! Don't stop! You're gonna make mommy cum! That's it baby! OH! Ahhh! Ahhh!" Mom pulled her legs tight around my head as she shook in orgasm! I licked at her pussy the whole time, even though she was pulling me in tight. After a moment, when her tremors subsided, she patted me on the shoulder. "That's enough, baby. That's enough!"

I looked up with a wet face, and saw that her face and chest were flushed, and her eyes were glazed. I felt very proud. I suddenly realized my dick was so stiff that it hurt!

"Come on up, baby. Let's make love now." Mom's voice was tender and sweet, and I felt like the world was about to change. I climbed up further between her legs, and pointed my penis at her opening. I lay down across her chest, and she guided me into her vagina.

Nothing could have prepared me for the sensation! A moist and silky heat enveloped me! I felt the electricity surge from my penis all the way to my eyeballs! I saw stars as I pushed myself all the way inside, and just lay there enjoying the feel of it. Mom let me get comfortable inside her, and then guided my hips back until my glans was all that was in her, and then she pulled me down back inside! A cold rush poured over me, and the heat between our legs began to swell.

Back and forth I thrust, finally fucking my mother! She moaned with the rhythm, and met each thrust with her hips. It didn't take long for that familiar fire begin to burn in my balls. Mom must have seen it on my face, because she whispered, "just let it happen, baby! Give mommy your cum! I want you to cum inside me!"

The words were barely out of her mouth when I exploded! I held her hips tight and pulled myself as far inside her as I could. Cum erupted from my balls, and I felt like my climax would never end! After several seconds, I was finally spent, and collapsed on top of her, my slowly fading erection still inside. She brushed my hair out of my eyes as I lay there. "That was wonderful, sweetie! (It was) so nice!" I smiled, not just with my own pleasure, but knowing that she enjoyed it as well. She leaned down and whispered in my ear, "Now it's your brother's turn to lose his virginity. Let's let him come clean up our mess and take your place!"

I slid off her, and climbed off the bed. I saw Tammy sitting between dad and Tony, with her hands between both of their legs, stroking them. Tony got up and eagerly got between our mother's legs, and began cleaning her pussy without prompting. I could hear the sucking and slurping as he licked her vagina clean. Within a few minutes, she began moaning as she built to her next orgasm.

I sat down on the other side of Tammy from dad. I didn't see much more from mom and Tony, as Tammy seemed to have something else in mind. She got on her knees between us and looked at us each back and forth. She had a mischievous grin and a sultry smile. Dad stroked his erection while staring back at her, and down at those magnificent breasts!

She spoke to dad first. "Why don't you get behind me little boy, while I clean my baby brother's dick?" Dad got up straight away, and poised himself behind her as she got between my knees. She smiled and licked her lips. "That looks tasty!" She eyed my wet and shiny penis that had already begun to stiffen up. She leaned in and swallowed my dick to the base! I moaned and threw my head back at the pleasure! She swallowed my shaft, and began licking around my balls while keeping me in her mouth.

After a bit, she pulled up and off long enough to encourage dad further. "Put it in me, little boy! Fuck me while I clean my brother's cock!" Tammy closed her eyes with a grunt, and I watched as dad shoved all his 8 inches inside her. She blew out a breath and looked back at me with wild eyes. "You taste like our mommy's pussy!" She took me back in her mouth while our father worked back and forth inside her. She sucked while dad stroked, and I held the back of her head and rode the wave of pleasure that was growing inside me!

Before too long, I was ready to cum again. "Tammy," I croaked. She just nodded without taking me out of her mouth, and I held on to her as I emptied my load with a long and loud moan. Dad had been watching intently and I could see him getting close.

His face was red and sweating, and his head was tilted back. "Miss Tammy? May I cum now? I want to cum, Miss Tammy!" Dad playing the little boy role was fantastic! If I hadn't already climaxed, I might have right then!

"Yes, little boy," she said. "Cum for Miss Tammy! Shoot your sperm inside me!" Dad closed his eyes and began to grunt as he spilled his seed inside her. Tammy's face was flushed and she laid her face in my lap as she shook with her own orgasm! She moaned and hollered as dad finished filling her up! After several seconds, when they could both move again, Tammy looked up at me with the same mischievous eyes she had before. "Go ahead and pull out now, little boy, so my little brother can clean me up!"

Dad grinned and stepped back from her, and she said to me, "Just slide down between my legs and let me sit on your face." I did so with great pleasure! I got down in the floor beneath her, and looked up at her well used vagina. I could see dad's sperm beginning to leak out. I laid my head on the floor and she pushed her lips down onto mine. I opened my mouth, and let our father's ejaculate fill my mouth! I swallowed the first part of his load and licked and sucked at the rest! (His sperm tasted different than Tony's, but was just as hot!)

By the time I was done cleaning my sister and she stood up, I could see dad up on the bed, between mom's knees- obviously cleaning up Tony's load. Tony lay next to them watching, euphoria painted across his face. Mom shook and shouted in one more orgasm as dad licked her pussy clean. He sat up and smiled at her with the same prideful grin that I had worn, his face just as wet as mine. Mom smiled and pulled his face to hers, and kissed him hard on the mouth.

We all looked around at each other, each one of us basking in a post-orgasmic glow. We had passed that final wall, and our lives would never be the same. The different ways we were now able to enjoy each other seemed endless, and I for one, looked forward to exploring each and every one!