Getting frisky on your sisters bed..
SexI had a major crush on my friends brother. He liked me too so one night while I was waiting for my friend to get out of the shower, we decided to get a little frisky. When he was almost finished (if ya know what I mean) she walked in.
It scared me but scared him even worse. As soon as she screamed bloody murder, he came all over her bed.
Now evertime I hang out with her she makes sure her older brother is gone.