well first of all being dense isn't sin so mamma boy being pure doesn't surprised me, since even in reality faiths doesn't see brain damaged actions as sins for example people with down syndrome, autistic or old people with Alzheimer. But what surprised was his mom was genuinely pure I thought she was craft witch that are using his son for her own benefit. Well no I see it's not the case she really loves her son as good mother. With all that torture and so on this was wholesome chapter. ngl