I had such a hard on by that time that I would need to go for a wank in her toilet. My partner could see the bulg in my pants, you could see the outline of my bell end.
I got up and ran to the toilet, took down my trousers and began to wank. I had not shut the door and to my suprise my sister-in-law came in. "like a hand" she said, and stood behind me and took hold of my cock. She began to wank me and it felt real good, she knew exactly what to do. I was soon spurting my cum all over the toilet.
When I came out my partner wanted to know what I had been up to. "I want you now" she said, and started to rub herself against my arse. I slipped my hand down the back of her jeans and found her arsehole, and in no time it slipped in. My partner was pumping away like crazy, I could feel her hot wet pussy against me and then she came, gaspping and moaning until she had finnished. My sister-in-law re appered I think she had been having some fun of her own in the toilet.
What a day!!