I awoke in the morning with my sister starring down at me.

"Did you have a good night's sleep my little puppy?"

'Of course not, I'm freezing, and being tied like this made it hard to fall asleep,' I thought, as I still had her panties tied in my mouth. I just stared at her, angry and humiliated.

"Oh, your shivering, I bet you need a nice warm shower to help warm you up," she said while untying the leash. "Come along, and we will warm you up, and I will make sure to turn the air conditioning down later."

She left my hands tied behind me, and led me into the bathroom. She had me climb into the bathtub and lay with my head facing the drain. She then took my feet and pushed them back till they were next to my head and tied them behind my head with some pantyhose, leaving me folded in half.

Being folded like this was starting to put pressure on my bladder and I really needed to pee. When I started whimpering, my sister started to laugh. She pulled out her phone and started to take a video of me.

"Go ahead and WARM yourself with a nice shower, cause I can wait here all day." She said with an evil smile on her face.

I knew I couldn't hold out much longer, and I also knew she wasn't going to let me up till I did it. I closed my eyes and let go.

I could feel my warm pee run out of me hitting me on my chest and face. It was so disgusting, but at the same time was nice and warm. 'How could Cassy do this to me?' I wondered.

When I had finished, and opened my eyes again, Cassy was standing above me completely naked. She straddled my legs and started rubbing her hairy pussy against my almost hairless one. It was like an electric shock hit me. I had never felt anything like it.

Before I had anything to really enjoy it, she lifted herself off me and started to pee right into my crotch. Her pee was running off my little pussy and running down my chest and my butt and back, around my shoulders, and on my face. It was all warm and really felt kind good after being so cold all night, despite how gross I really thought it was.

"Mmmm...You should get use to that to, I like doing that to you, sis," she told me. I shuddered at the thought of that.

Cassy finished and untied my legs, helping me stand up. She uncuffed my wrists and told me to take a shower, and when I had finished, I was to wait there till I was dry for her to come get me.

As I showered, I was trying to think of any way I could get out of there, maybe go over to a friend's house until our parents got home, but I didn't have any clothes. So where was I going to go?

"Alright Lucy...Down," my sister said as she walked back in the bathroom.

I looked at my sister with anger in my eyes, then shoved her as hard as I could into the wall, and ran for the laundry room hoping to find something to wear and get out of there.

I found a tee shirt and shorts quickly, and made a dash for the back door without even putting them on. We didn't have any close neighbors, so I thought I could just put them on outside, but Cassy thought of everything.

As I got to the back door, I found it locked! As I fumbled with the lock, Cassy grabbed my hair and pulled back hard.

"I was trying to be nice and let things go easier for you, but I can see that you don't want to play nice," she said. You could hear the anger in her voice, no matter how calm she was. "Come along."

She brought me into the living room and pulled me over her lap, and grabbed her hair brush off the table.

"You'll never get away with this, I will tell mom and dad when they get home and you will be in soooo much trouble!" I shouted at her, tears running down my checks.

"You still haven't figured out that tattling on me is what got you into this mess in the first place, have you?" Cassy asked me.

She brought the hair brush down hard on my butt. I screeched, and kicked out.

Smack, Smack, smack, smack.

"OWWWOOOHHH! Ow, Ow, P-please stop!" I begged, but she laid into me for about five minutes, which felt like an hour as my ass burned.

When she finally stopped, she pushed me off her lap and to the floor. I just laid there sobbing, and shaking, too weak to move.

Cassy looked down on me, and told me to 'stay'. She went to the bathroom and grabbed the collar I had on earlier. She wrapped it around my neck again, and asserted my role as a dog again.

"Are you ready to do what all good doggies love to do?" she asked. "Do you even know what doggies do?"

"Cassy, stop being mean to me...PLEASE!"

All she was wearing was a long nightshirt, and she let out a sigh, as she turned around, lifted the hem of her shirt, and pushed her butt in my face.

"They all love sniffing and licking ass," she told me grabbing my head and pulling it into her crack.

I thought I was going to suffocate between her butt. I could smell the piss from earlier, as she hadn't showered, and the earthy smell of her ass, and a smell of arousal. I reached out with both hands to push her away from me but only accomplishing a handful of firm butt checks.

I pulled my hand back, and as hard as I could... I punched her in the ass. She stumbled forward a bit, but still had a firm grip on my hair.

"OWCH! YOU LITTLE BITCH!" she screamed. "Still not getting it yet you stupid little dog... ARE YOU!?"

She pulled me towards the back sliding glass door. I knew she was going to bring me outside, and I was terrified. I tried to pull away from her not wanting to go outside like this, not now. There wasn't any houses close enough to see me, but there was a walking trail at the far end of our yard, so if anyone poked their heads through the bushes, they'd be able to see me!

"What's the matter Lucy, I thought you wanted to go outside?" My sister taunted me with spite in her voice.

She unlocked the door and dragged me outside and tied me with a heavy dog chain with a padlock to one of the posts of the deck. I had no idea where she was getting all the dog stuff as we didn't have a dog.

"P..P..Please don't leave me out here Cassy, I'm begging you."

"You should have thought about that before you punched me," she said with venom in her voice. "You are going to stay out here till you learn to be a good doggy, and learn to beg like one. If you're a good doggy, I won't have to call your little boyfriends and tell them where to come see you."

"OH GAWD NO!! PLEASE, I'LL BE GOOD!" I was almost screaming.

"We will see, my ass is sore where you hit me...Kiss it and make it feel better," she sneered. "If you're a good dog the rest of the day, I might even let you sleep inside." She turned around and lifted her shirt about her ass.

I gulped hard and leaned in and kissed her butt where I had hit her.

"Good girl." With that, my sister went inside. I lay down on the back porch, under the deck, crying.

Cassy came back a few hours later. She had gotten dressed while she was gone. "How is my little puppy doing? Hungry for some dinner?"

I got up on my hands and knees before sitting down like a dog would, and I just stared at her not know what to say. I was hungry, but if I said yes, would she leave me here all night?

She just stood there waiting for an answer, so I just let out a little 'ARF'.

"Good girl," she said as she walked back in the house, coming back out with two dog dishes. One had water in it; the other had what looked like bits of steak in gravy.

I just looked at her, not knowing what to do.

"Well eat, and no hands, puppy." She told me.

I leaned over, and tentatively took a bit of the 'food', oh gawd it was awful. She actually did feed me dog food! I spit it out, gagging and coughing, and started gulping the water down.

"NO!" she screamed, startling me. "YOU are a DOG. You will eat all of that, and when you drink water, you lap it up with your tongue."

I started crying, and whimpering.

"You will have those bowls clean by the time I come back, or you stay out here till you do," she scolded.

I forced myself to eat all the disgusting dog food and my sister came back.

"Do you need to potty puppy?" she asked.

"Arf" was all I could do.

She unlocked me, and connected a leash. She then proceeded to pull me out into the yard.

I tried my best to not follow her. "Please Cassy, where are you taking me?"

I got a swift smack on my ass. "Dogs don't talk!" she scolded. "I'm taking you out to go potty. Dogs go to the bathroom outside, are you stupid or something?"

I started shaking my head 'NO', but she just pulled me along on my hands and knees.

"Ok, you can go right here, make sure you lift your leg, we don't want you to make a mess all over yourself do we?" she said.

Gawd, this was the most embarrassing thing I have ever had to do in my life. With my sister standing over me, I lifted my leg, and let my bladder go. I could feel some of my pee run down my left leg, and the rest puddling beneath me.

"Looks like you need a lot more practice with that, you made a mess on yourself." She leaned down, and pulled a cloth out of her pocket, and wiped my leg and slit with it. "This should remind you to be more careful when you pee," and she shoved the pee covered cloth in my mouth.

I gagged at the acrid salty taste of the pee soaked cloth. As she led me back into the house and to her room.

"Now, you can go to sleep on the cold floor again, or you can sleep up on the warm bed with me, which will it be?" she asks, as she took the rag from my mouth.

I knew that if I chose to sleep on the bed that it was going to cost me something, but I knew I didn't want another night on the floor.

"I...I...W..Will t..Take the bed," I stammered.

Cassy sighed again, making me realize that I had done something stupid.

She picked me up placing me on my stomach, about half way down her bed and tied a rope around me that was wrapped under her bed. She tied it so tight that it was a bit hard to breath.

"Now what have I told you about speaking?" she said to me.

That's when I realized what the mistake was that I had made. She smacked my up turned ass till I was whimpering and struggling, then left me there as she got 'ready' for bed.

When she came back into my view, she was naked. She laid a piece of rope across the back of my neck, then placed her legs on either side of my shoulders, and scooted up till I was staring at her hairy pussy an inch from my face.

She leaned forward, and said; "I told you, you are going to sleep tied to my pussy if you weren't going to behave."

The rope running behind my neck, under her legs, finally being tied behind her neck. Even I could see the brilliance. As soon as she laid back, my face will be pulled into her crotch, and there was nothing I could do about it.

I starred at her wide eyed, heart pounding in my chest.

"I do hope you learn what to do before I fall asleep, because if I don't get off tonight, I will take it out on your ass tomorrow."

With that said, she scooted forward, and laid back pulling my face into her wet pussy.

"MMMMM HM HM HM," I groaned and cried into my sister's pussy.

I could taste her on my lips, and giving in to my hopeless situation, I stuck out my tongue and licked.

My sister moaned, "I know you can do better than that."

So I started licking her harder, realizing that I would rather lick her now, then be whipped later.

As I found the hard little nub at the top of her slit, I sucked it into my mouth hard, feeling her pubic hair tickling my nose. I was surprised to find that I was getting wet in my own pussy. What was wrong with me? This is my sister, and she was being so mean to me, and I was getting a good tingling feeling between my legs?

"OH fuck, I knew you were just a little lezzy puppy girl! You love pussy don't you bitch! OHHHHH YEESSSS, SUCK MY CLIT! GAWD I'm SOOO CLOSE!" my sister was screaming.

Her juices were flowing out of her pussy faster than I could lick them up. I was lost in the smell of my sister's pussy. It was making me dizzy. Then she let out a scream and started bucking and grinding against my face so hard that I thought she was going to break my nose.

"Oh god that was good," was all she said before passing out, leaving me tied to her pussy for the rest of the night, leaving me wonder what other things my sister would do to me the rest of the week.