"Yea... fine mom," I replied."I'm going to do a it a little harder. Tell me if you don't like it."Mom slapped my ass cheeks in turn again, this time a...bit harder. This time for some reason, the slapping seemed to have more of an effect on me and I felt my dick respond a little. I didn't know why.Then between the slaps, mom ran her fingers along my butt crack, just tickling it, which felt pretty good too. It seemed like she had been a bit of an expert at this in her time. Finally she gave my ass. Meanwhile Peter and I vacuumed the house before heading out to the supermarket to restock nibbles for the evening, by the time we returned Carol and Jan were sitting in the lounge enjoying a glass of Champagne chatting away giggling at each other like school girls, when we asked what was so funny Sally told us that they had been to the Adult shop and how they had invited the sales girl to the party, “what!” Peter interjected “you’ve invited a stranger to our swingers party!” with a giggle,. I knocked on the door and she opened wearing a very sexy red teddy. Her tits poured out the front like they were aching to be sucked and touched. Hey, she said turning around to walk back to her room. Hey yourself, I said grabbing her by her arm and turning her around. What are you doing, she asked looking puzzled. Come here, I said pulling her towards me. No she said, you’re drunk, go to bed. She tried to pull away but I pinned her to the wall and went in to kiss her. She turned her head and I. " He went up the stairs and moved to the bedroom door. He felt a sudden flash of anger as he watched nineteen year old Craig fuck his thirty something wife in her ass - the ass she would never let him touch. He shook his head in disgust, "Jesus Christ Gail, what's wrong with you? He's only a kid."Gail's head came up from the pillow and when she saw him she tried to pull away from Craig, but the teenager was too close to his release and he held on to her. The kid gave a low grunt when he came.