Mr. Hamilton would talk to the six of us teenagers about any changes in the sleeping arrangements. I told him that it had just come on the news that a...prankster had set off the fire alarm and they were looking for a suspect.Dad reminded me, "I want for you to behave as well as you normally do at your grandparents houses," before hanging up.After talking to my Dad, I heard Robin's mom calling them to set the table for supper. I decided to help since that was something I normally did at home.. She scurries to the back bedroom while we have an awkward moment before he gets two beers from the fridge. I dont think we even touched the beers. She came out in a satin robe. Starts to undress him. I start taking off my clothes just as fast. She gets him half undressed and tells me "No, no, no. You said you would..." She's still getting his cock out. I thought she was going to suck him. Wrong. I know this look. Got closer. She held it for me. Can't even remember what she said when my tongue. Suzi grabbed a bottle and started pouring it over my cock and rubbing it in. It was lube, she was getting ready.“John, are you ready? Can you see how thick this cock is? It’s a thing of beauty! Ready for me to sit on it?” and with that, she lifted herself up and took my cock in her hand and pointed it straight for her wet pussy. She rubbed the head a few times along her pussy and then positioned herself and sat down a little bit. She let out a large gasp as my cock head slipped inside her. She. Suzy led me towards the bed and told me to lay face up and took hold of the straps she had already fixed in place, after a bit of readjusting, she strapped my arms and legs down and I lay spread-eagled and helpless.She climbed up and straddled my chest and took off the robe, "looking at you all naked and tied up helplessly has got me horny," she said.I felt her reach under the pillow and pull out one of her many her vibrators, within seconds she was grinding and moaning on top of me, whilst all.