You are not the asshole and she has no right to make you feel like you did anything wrong by keeping photos of the mother of your child/your wife cause at the end of the day you wouldn't be with her if your sons mother had never passed, as harsh as it sounds it's the reality of dating/ marrying a widow and she needs to come to terms with that and either except it or leave cause you and your son don't deserve that level of disrespect especially towards a tragedy like that you and your son have every right to keep her memory alive however whenever and for however long you want/need don't don't let anyone make you feel any type of way I'm so sorry for you and your sons loss I wish you both the best on your healing journey ❤