HUNTC-199 My sister has come to live with me in the new house where my wife and I live because she goes to school. She seems to like me and is trying her best to seduce me. She masturbates every day and thwarts our family plans.

My wife and I live in a new house. Just as we were talking about seriously trying to have a baby, my younger sister came to live with us because she was going to school. It would be fine if we were just living together, but my sister seems to have a crush on me and is seducing me with all her might. She jerk me off every day and is thwarting our family plans...! At first I strongly refused, but I gradually became attracted to my sister who is cuter and sexier than my wife... Now the sperm I produce during baby-making sex with my wife is as thin as water! Sorry, wife!