![](https://pic1.mangapicgallery.com/r/avatar/0f/u590760_50x50.jpg?2)
Hyesung has the right to be depressed, to want time to be alone, and to think. Sometimes, you've got to let people be for while.
I think telling Byul that mommy is sick/not feeling well would have been better than him seeing his mom then being rejected. But I'm guessing that the plan was for Hyesung to snap out of it/suck it up for the sake of his son.
Ah, yes. Because she has big breast, she is obviously trying to tempt your boyfriend. It's not like she didn't have choice of her breast size or anything. She can totally control who stares at her breast.