HUNTB-741 Our Family Has Grown Without Us Even Realizing It! "Nice To Meet You! I'm Your Sister From Now On." Sex With My Sister-in-law, Who Just Became A Family Member, Felt So Good! From University...

Living alone has been my dream since college. A woman I didn't know suddenly came there! From what I hear, it seems like she's going to be my older sister. She seems to be my step-sister who was born when my parents remarried without permission. Furthermore, since their homes are close, they often visit and help each other out as they live alone. I was supposed to clean up her room, but my girlfriend's sister-in-law discovered my AV and saw it, and she got horny and went into heat! I ended up having sex with my girlfriend's sister-in-law, who was a stranger to me until yesterday, but now she's part of my family!