Both mom and Seo-in dad are trash to be honest and Yeongwoon dad is worse than trash
She prb paid off the MC's dad to put a distance between the MC and her son, she might noticed that her son likes the MC a little too much.
Yes, this makes sense.
It can go both ways: settlement money (the dead brother beat up the MC), and pay-off money to drive the MC away from the ML. The dad got the money then kicked the MC out of the house due of his homophobic ass.
I’m guessing the mother js bribed his dad with money to be quiet? Does she feel bad or is she js startled? Idrc but if she was a reason for yeongwoons trauma or disorder then I already hate her and the brother.