I've always been in love with my sister-in-law. To distract myself from these feelings, I ended up secretly watching her masturbate. In that instant, something inside my chest seemed to burst. "Let me... make you feel good, nee-san!" I declared. She resisted, saying, "No, we can't... we're family by marriage, we're like brother and sister." But in the absence of her husband, the primal urges of male and female drew them into a forbidden relationship. I took what belonged to my brother, while my sister-in-law, overwhelmed by long-forgotten desire, felt her pussy grow wet. This intense affair begins to tear both their hearts apart.