What?!?
"If losing a twin, made him feel lost and lonely"
Does she really think that it was the grief of losing his sister that made him a murderer?
Is she actually smart enough to read and understand Sun Tzu, but also THIS dumb?
I dunno, maybe losing his twin sister, then being erased from existence by his own family, forced to "be a girl" and to actually become his sister...
Maybe having his actual life be this undervalued by his mother might be the reason he turns completely Norman Bates?