I just want to say that I think Ma was incredible. She managed to raise Jack so brilliantly and teach him so much against all odds. She really is amazing.

Although he struggles with social stuff, Ma pushed him academically with him being able to read and write. She did the very best she could throughout.
I don't think she would have coped without him. I think it would have been a recurring cycle of abuse, pregnancy, abuse etc...
His toughest challenge? People.
I think had it been narrated by Ma then more would have had to be said about the actual abuse. With Jack's narration it means it's all implied, which makes it worse in so many ways itms?