UGH. Okay, this is not okay.
This older sister is legit pissing me off because of her toxic control over the boy.
No wonder her husband left her. Let's argue that cheating was wrong and him leaving was bad, but my god. When a girl uses sex as an excuse to get her way and makes you work for it, I feel it was just a matter of time before it got old and he had enough. Nowadays people will just call the dude a simp, and laugh it off, but he man'd up and walked away.
This girl is literally using sex to get some sort of achievement, and is now using his kid brother now just because her relationship failed.
Ofc I'm writing this full well the author will probably write an ending where the brother is total douche and a half later on, but I'm still against what she's doing.