AP-124 "It's not my fault! It's my big-breasted sister's fault!" My only ally in this shut-in life is my big sister! She's very kind, smart, cute, and has big breasts! She's the woman of my dreams!

My older sister is my only ally, teaching me my studies and taking care of me, a shut-in! She's the ideal woman! But sometimes she comes wearing revealing clothes that show off her huge breasts, and when that happens I can't concentrate on my studies at all and naturally I get a hard-on! When my older sister notices this and pulls away, I'm quite shocked! So I forcefully groped her breasts and did it with all my might!