HUNTB-576 "Isn't it better with your sister?" She even let me do the thing she absolutely wouldn't allow—inside her. My brother-complexed sister, driven mad by jealousy. Even a loser like me has a girlfriend...

Even I, an unremarkable guy, have a girlfriend! Every day is happy, but there's one thing that worries me. That's the existence of my new sister-in-law! Why? Because she's jealous of my girlfriend and tries to seduce me with a more erotic body and technique! The more I refuse, the more her jealousy escalates, leading to insertion & internal ejaculation...?! I feel bad for my girlfriend, but I can't resist an adult woman's seduction... She has a great figure and is way too erotic.