HUNTB-520-Uncensored-Leaked — "If you keep quiet, big brother, I'll do something nice for you..." The younger sister, who is head over heels in love with her new stepfather, is seducing him and having sex with him, and the protagonist witnesses this...

My sister, who is head over heels for our new stepfather, has been seducing him and having sex with him, and I witnessed it... I can't keep quiet thinking about my mother... But my sister comes to my room and reaches for my dick to keep me quiet, and her forceful fellatio and seduction make me uncontrollably aroused... I end up making a deal with the devil... Even though she's family, I can't resist when she's giving me free sex! I never imagined my sister was such a slut... Both my stepfather and I are being manipulated by my sister.