From what I know she leaves him with his abusive dad re marries and has another kid and basically abomdens him
Additional to this her new husband left her with the kids after they knew about Hyeseung.
Just like everyone said she abandoned him. Hyesung ended up meeting with his mom since she found out about him after his dad crashed out. They talked and she asked for forgiveness. Hyesung wondered why his mom never came to look for him and she had the audacity to say that he never tried either. Dojin then asked her to leave but he's been providing her with money. While Byul also goes to visit her. We about to see old Hyesung.
i never read love is an illusion i only like skimmed through it i know the mom did something but can someone confirm if it was leaving or smth else?