Dave came over at about 6pm that evening. Pete's mom was serving up the evening meal.
"Hullo, Pete. Hi Mrs Williams!"
"Hello David, would you like some dinner?"
"That would be great Mrs Williams, you're a wonderful cook. I wish my mom was as good as you."
Dave winked at Pete, "Don't you wish my mom was as good as your mom? Would you like to fuck my mom, Pete?''
"David, please don't encourage Peter - he has enough bad thoughts in his head without you putting more in there."
Pete was feeling a bit embarrassed by the two of them, his mother and his best friend. Neither of them had done anything particularly wrong, and neither of them had done anything to hurt him - in fact, since discovering their little secret, he had got to fuck his own mother and gotten a wonderful blow job from her as well. He didn't really have much to complain about, except that he did feel they were trampling over his own feelings without much consideration.
"Peter knows that I'm fucking you, so there's no need to be shy about it!" Dave said, "I expect he has been thinking about fucking my mom too, probably he's been jerking off thinking about it, haven't you, Pete?"
"Sure Dave, I'd like to fuck your mom up the ass, would you like to watch that?"
"Sounds fair, Pete. Mrs Williams, can I fuck you up the ass too, please?"
"No, David and stop talking like that, you know I don't like it up there. Now, both of you behave properly, especially at the table. I really don't believe this conversation, it's like some kind of bad porn story. Normal people don't talk like this, not at dinner, anyway."
"Sorry, Mrs Williams ... maybe after dinner?"
Shirley couldn't help giggle a little. Dave was young, horny and cheeky. He was also very natural with it, not at all awkward like others his age, not like Peter, for example. She shouldn't encourage him, but to do it a little was fun although a little dangerous.
"Maybe after dinner, Dave!"
The boys behaved themselves through the meal, Dave being especially polite and flattering. After dinner, Dave offered to do the washing up and Peter, who normally avoided such chores felt obliged to help him. Shirley thought what a good influence he was over her son, but a feeling between her thighs soon reminded her that Dave's influence was rather mixed.
Dave did not waste much time. After the washing up was done and the table was cleared, he grabbed Peter's mother from behind around the waist and with his right hand reached up under her skirt and felt her wet slit. It was wet and slippery, it was always wet for him; he pushed the thin fabric of her panties up into her. She gasped, feeling his rough handling on her sensitive clit. Dave moved his left hand up to her right breast, giving it a squeeze through the thin fabric of her blouse.
"No, David, not in front of Peter!"
"Pete likes watching you getting fucked, Mrs Williams. He knows I am going to fuck you and he'd be much happier watching, so let's have you bent over the table with your panties off, all ready for my big meaty cock."
"No, David!"
"Yes, Mrs Williams, you know you want to get fucked, and I even think you want your son to watch you. Come and help me, Pete, you can have her when I've finished."