When I was only 15 I walked into my grandfathers house after school to find him naked and having sex with another man. My grandfather was fucking the other man from behind with his huge erection (who I later found out was his gardener) over the kitchen table. I nearly screamed out loud until I saw my grandma quite nonchantly sat sipping a cup of coffee watching them. As quietly as I could I walked out and decided even at that age it was not for me to tell my mom. So all these years I've kept it quiet. My grandfather past away last month and for the first time since I discovered them, I had a real long conversation with my grandma. She simply said thank you for not saying anything and I hope as an adult I understood their sexual tastes. She'd known all along I'd seen them and hadn't said a thing....