They cant really blackmail his dad like that. They need him to be the miracle hand and maintain a good public reputation. Exposing the MC, would just be shooting themselves in the foot.
TBF to the mom tho, I'd be pretty ashamed to have a giga simp for a son. So its understandable why she left him.
I'm just glad she didnt end up taking her own life or anything bad like that.
The mother never told her to push that kid down the stairs. Neither did she tell her to set up the step dad or spread rumours about the step daughter.
She made those choices on her own and needs to be held accountable.