My sister-in-law (sali) was impressed by my thick cock.

I was visiting my in-laws , and my wife was not at home and has gone to the market. And I always had this fantasy of fucking my sis in law behind my wife back so I took this opportunity and grab hold of her and to my surprise even she fantasies about me in her bed while fingering herself. So we made our dream come true and fuck each other about half an hour, satisfied and went back to our doings like nothing happened.