TLDR : Wife let me relieve my morning glory in her sister from behind.
**Preamble**
It would have been about a month before I got some more action with my [M45] wife’s [F45] sister [F43] Kate and my first fuck with her. (Check out my other stories for the back story)
It was a Saturday morning and I was lazing in bed toying with my morning glory while Jane was getting ready to go out shopping. She saw the slow rise and fall of the duvet and said that Kate was on her way over to go shopping with her and perhaps she might like to pop up for ‘breakfast’.
This got me really excited. I could feel my cock stiffen to full attention. I gripped it firmer and rubbed a bit quicker only stopping just as I reached the point of no return. I felt a dribble of precum ooze out and run down my helmet. I held the duvet off my throbbing dick to prevent any further stimulation. It was difficult not to start up again. My balls were desperate to be drained.