He came in and I went to the bathroom, after five minutes I went in the bedroom and they were both on the bed snogging, I walked in and Donna said “...’ll be back in a minute” as he and I looked at each other he made small talk. Then Donna appeared wearing stockings and suspenders, her usual seductive look, walked up to him and sat on the bed with him stood in front of her.As she kissed him she ran her hands over his body as I fondled my wife’s tits from behind, she undressed him completely. I don't know whether all that's true or not, but it worries me. I don't want everyone to know that I'm already having sex with him.I'm pretty sure that my older sister is already no longer a virgin, but I've not noticed any real change in her appearance. You see, I saw a kondom on her bedroom dresser, and she became embarrassed when she knew I'd seen it. But she said she'd bought it at the pharmacy for a friend who was too shy to buy one. She pretends to be very strict and won't have sex until. We soon moved from panties that I had no interest in, like thongs, or see-through, and found our way to the panties that I did like: the full, satiny panties that cover your cock and your bottom in secret pleasure. I found out what the sales girl was thinking when she asked me, in a very quiet voice, “Are these the sort of panties that turn you on?”She actually wanted to know. My mother interrupted, and said, just as quietly, “Yes. These are the kind that turn him on the most.”That was it. My. She was going to make me cum, and just have multiple orgasms. The excitement of fucking a first timer, and just being fucked by a cute and sexy kitten like herself, just made me want to scream at the top of my lungs, until they just gave out."Shit, sweetie, you are making this MILF cum a river," Amber screamed.I couldn't help it, whether she wanted it all over her face or not, she got it. Just as I expected, I had multiple orgasms, so it lasted for a couple minutes. She just stayed right there.