Embarrassing bikini stories?

I was sitting by the pool with my wife's insanely hot little sister. She had just gotten out of the pool and had laid down to sun herself in a chair. That is when I noticed that she had a very dramatic front wedgie in her teeny tiny swim suit. Both of her plump little pussy lips were hanging out, hugging the fabric! The crotch of her suit almost disappeared entirely. I leaned over, and with a very noticeable smirk to her, "Your, uhh pussies hanging out." Needless to say she was mortified. I on the other hand was quite pleased :-D