EBWH-233 "I won't cheat on you because you're my girlfriend's sister" During a trip to a hot spring with my girlfriend, I seduced her by showing off my big breasts and showing off my maternal instincts! I was reverse NTRed right i

My girlfriend, her sister and I went on a trip to a hot spring. It was supposed to be just a fun, healthy, and peaceful trip, but... I couldn't resist my sexual desire when I saw her sister's amazing body, and before I knew it, I was having sex with her while she was sleeping.