In my 20s and 30s I lived in a mining town in west Australia , my ex and I had a couple same age as us as good friends who we associated with a lot . Well the wife of friend was a petite thing who was a major cock tease but would never follow through on anything even know she knew I wanted to fuck her . On one of our regular game nights she was going hard on the teasing knowing I was getting worked up , she would sit in a position where I could see her knickers and when no one was looking she would part her legs knowing I had a perfect view up her short skirt. Well on this occasion she had pulled her knickers together so the lips of her balled vagina were showing around the material. She thrived on the fact I couldn't touch her . Well it was my turn to go and make drinks in kitchen so if I went but got a wicked thought in my head , I made the drinks and dropped my cock in her glass squeezing my cock to allow my flowing pre cum to join her drink , gave the drink a good stir as there was a fair bit and went back to join game . She downed drink without any idea it was laced . I offered to make next drinks as I made excuse to go check on kids and would make on way back . Well I went straight to bath room pulled my cock out and blew a load in hand heading straight back to make drinks adding this time a good load of cum to glass mixed it in and back to game . Again she downed drink without any knowledge she had just swallowed my load , now it was my turn to grin ... to this day I'm sure she has no idea she has swallowed my load on more than one occasion as I repeated the event on several games nights over years .