I went on a hot spring trip with relatives, and my cousin's huge breasts were right in front of me. While we were all washing each other, I got an erection, and my cousin who saw it was also excited. I pretended to wash her and ended up grabbing her huge breasts. Alone together in the open-air bath, we naturally continued our touching. Taking advantage of no one coming, I had her suck my dick in the bathtub and washing area, and even secretly had sex.
