But how? He was already dead.
Sadly it can't be the mcs son since he was littarly crushed to death(?)
Most likely not since he's definitely dead, I think his head was crushed by the vehicle that ran him over?
Anyway, my best guess would be a close friend of the son's who witnessed what was happening (the bullying) but didn't do anything, then realized who MC was and decided to help her with her revenge.
yeah, the mom's son is dead, not his head being crushed but his body being run over and cut in half.
I have no idea how the hell that would be possible in ANY way but fuck it, I want the third party to be the MC's son