A Family Trip to Hawaii and Unexpected Moments

It was innocent, really. I find my wife's sister quite attractive. She's athletic, tan, spunky, and hot.
We took a family trip to Hawaii and we were spending a lot of time at the beach. My wife and I had our own room, and her sister was sleeping on the condo couch, but was using our bathroom. She was a sophomore at college, so sleeping on a couch wasn't foreign to her. She left her swimsuit to dry in our bathroom, and I just had to use to beat off. It was still damp from the day's use, so when I got there I came in the protective part of the bikini bottom. A nice full load.
I was honestly surprised when she was wearing the same bikini the next day. She even commented that her bottoms hadn't dried all the way. So, naturally I convinced my wife to give her a front wedgie.