I had phoned my sister-in-law a day before saying that I was likely to be in the area and if she was at home I would pop in for a few minutes since we...did not see each other on a regular basis. She said it would be lovely especially as her husband was away on business. When I arrived I was just come in via the back door which would be open since the weather was so nice at the time. This was our usual arrangement whenever we went to visit.After I concluded my business I drove to her house and. I was surprised when I heard her groan and begin shoving her ass back at me! This is great, she's a butt slut! Within a few seconds I was balls deep in her and she had reached back through her legs grabbing my balls to keep me in place. I took my left hand off her clit and attacked her nipples again, after about 30 seconds she eased her grip on my balls. I began slowly pulling out and sliding back in. I was taking my time, wanting this to last. Marilyn had other ideas. She started. I asked him what it was and he told me it was the latest date rape drug. I asked if it was safe and he told me it was and anything she did, she would forget by the next day. It sounded perfect and coupled with the drink and lust I decided to go for it. The guys name was Peter and he was about 40ish, slim and not ugly. He handed me the small vial of liquid and said just mix it into her drink. After doing this I called my wife off the dancefloor and introduced her to Peter. I handed her her drink. He stood at around five-foot-ten, with brown hair, brown eyes and dusky skin. His features were handsome enough, if a little childish, as the babyfat on his cheeks wasn’t gone yet. His build was lean, yet lacked the full power and stature that a grown man had. He had a look about him that said you could trust him, but only so far, as he had a mischievous twinkle in his eye.“You get all those archived cases fully sorted yet, Willem?” Daved questioned.“Just finished. Why? You got some other.