EBWH-233 _Ignore your girlfriend's big breasted sister

"Because you're your girlfriend's older sister, it can't be called adultery, right?" During a hot spring trip with my girlfriend and her sister, I was caught up in an irresistible temptation right in front of my lover. At first, this was just a fun, innocent trip, three people relaxing and enjoying the vacation. However, her sister's extremely seductive and plump body made me unable to suppress my desire. And then, while my girlfriend was sleeping right next to me... I went too far..