I slumped in my seat, dejected. My wife just told me that she was going out shopping all day with her mother and sister, and guess who has to babbysit - yes me. My first weekend off for months and I have 3 kids to watch for at least 16 hours. My stepdaughter Sam(2), and my sister in laws kids, Anna(2) and Ben(7).

My sister in law Karen came through to the kitchen where I was and hugged me from behind and kissed my neck. I felt her large breasts pressing against my back and her hand stroked my hardening cock through my jeans. "Thank you, for watching them today" she whispered and gently licked my ear. My cock was rock hard.

"You might want to have a wank before you bath them" she giggled "I wish it was you and me in the bath again."

I used to babysit Audrey and Karen when they were young, I lived next door and first fucked Karen when she was 9. She was very forward even as a kid and loved sharing a bath.

The spell broke as I heard my wife Audrey walking towards the kitchen, Karen gave my cock a last squeeze and pretended to find her purse.

"Here it is Audrey, my purse was in the kitchen. Lets go spend your husbands money."

Audrey came in and kissed me hard on the lips, "I promise I wont be too late" and they were gone.

I listened to Audrey's car roar in action and waited till I could no longer hear it.

Bath time. I had not bathed a kid in over 15 years but I thought if I get it out of the way then they might sleep. The 2 girls were happily watching a cartoon so I got Ben in first.

I ran the water, made sure it was not hot and had lots of bubble. Ben looked at me and raised his arms up, he wanted me to undress him. I lifted his t-shirt and took it off, then pulled down his trousers, my cock twitched.

He stepped out of his trousers then pulled down his underpants, I looked at his little penis and my cock was so stiff it was sore. As he stepped out his penis jiggled and he laughed. "Why are you looking at my willy" Ben asked.

I gently flicked his willy with a finger and said "because it looks funny" we both laughed.

"I need to pee" said Ben "Mummy always holds it so I dont pee on th carpet.

I held his penis as he peed.

"Uncle Peter, do you want me to hold your willy as you pee" he said.

I dropped my jeans and underpants and stood in front of my 7yo nephew with my cock sticking up.

"Wow, its huge" he looked at my 6" uncut cock as I pulled the foreskin back and forth, slowly at first but as I felt myself cumming I pointed at his chest and came on him, splattering him with 5 big helpings of sperm. I took his hand and putting it on my cock told him to keep pulling the foreskin back and forth and took his tiny cock in my hand and slowly wanked him.

He started getting harder and he closed his eyes.

His breathing got shallower and his cock jerked as he came with a loud groan, fucking my hand but without the sperm.

He opened his eyes, stepped forward and kissed me on the lips. "You're better than mummy" he said then got into the bath leaving me standing, my cock growing again..