My husband and I's sex life has not been good lately. At this time, my sister-in-law, Ai, will be staying at our house for a while. She has a very serious appearance, but her body, especially her giant breasts, can be clearly seen even when she's wearing clothes! What I didn't expect most was that she was an erotic novelist! While I was working, she came to my room and actively invited me to have sex! My cock couldn't resist her charm. Even though I knew it was wrong, I couldn't stop!