Bro was okaya in love with her son or something

No lol. He was only obsessed with her son because the son never broke and kept disobeying okaya, okaya wanted to see the son break like the other victims that's why he said the son won because he didn't run to suicide like the others (if some think that the son jumped off the road because of suicide you're wrong, he just didn't want okaya and his group to post the edited video of his mom)