I think he kinda deserves it.. He was quite literally helping the 'cheating' and knows her sister knows about it lol. He continues in the end that he is looking FORWARD to this conclusion (that implies he doesn't care about his sis feelings anyway).
Regardless how fuced up his sis is, he still betrays her without knowing she is innocent or not
I'm sorry I thought you said 'top'.. wrong person LMAO. But regardless the bottom also aren't right
You just don't use people to proof a point. The situation is fuced up because of him, he quite literally dated his sis for a while just because and drop a bombshell that he actually like her brother and not her. How is that not twisted lol
Tbh the bottom don't deserve both of the sister or brother like bro run find someone who's good, and prioritize you