My ex-girlfriends dad ( who was a very large man ) walked in on me eating out his daughter who was 17.... I was 19 at the time... scary... he told me to leave. the worst part was walking through the living room past him to leave.
I was having sex with my girlfriend's sister, and her mom walked in. Not only did she start screaming because I was piping her daughter, she knew I was going out with her other one so she went absolutely nuts and got on the phone. I knew she was calling my gf to tell her what had just happened so I panicked and ran out of the house after throwing on my clothes.
In order to save face, I called my gf while driving away and dumped her. She sounded really confused and hurt, turns out her mom handn't called her but her father instead. She learned eventually though.
You're a dick for that, but nice laugh + repped