normally i picture kidd coming to such a realisazion as a moment he needs to step up and be her equal. shoulder some of the responsibility. here... here it's devolving into kidd loosing his hero worship instead. not respecting her anymore, at least not her authority over him. as he gets older, they probably had already been getting snippy with each other. little barbs back and forth. and they fight, but until now killer's always handed him his ass the first time kidd throws out 'your not my mom' killer's immediate reaction is 'i fucking hope not since i let you stick your dick in me!'.. so she's not sure why him saying that hurts so much but then it finally comes to the big fight, the two just screaming at each other. killer's cramps hurts enough she wants to vomit, but instead it's just words she cant take back. in her mind, everything she's endured has been for him. kidd looked up to her for help, and she spent her whole life cutting away pieces of herself to keep him safe. fed. clothed and sheltered. i can see her getting so mad she's crying, regardless of how leaves first. just spitting venom though a red face of tears kidd at that age where he's filled with anger and the desire for destruction(back of the coin to creativity) and killer end up being is target. i think some little rational part of kidd that still exists knows if his did hit her, now, like this? he'd win. right now, she's weak. she's not in control, she's emotional, she hurting. he could, for real... break her. so he yells instead. he keeps his fist to himself and tears her apart verbally i'm mulled it over in my mind and either leaving first can spell out such pain, i cant decide. im not sure yet how they reconcile. words got them into this mess, but.. words to fix things isnt' really either of their style. maybe this is where kidd apologies by doting on her instead. like you said, the cooking, braiding hair, massage.