my thoughts were that his sister has had a lot more exposure to the world at large than he has since she wasn't constrained by responsibility. so he's a little behind when it comes to social media and pop culture, especially since they grew up in a fairly strict catholic household, although i'm sure with his sister their mother relaxed considerably on that, considering the majority of her teens their mother would've started to decline. so while he took care of her as a sort of pseudo-father figure, i'd love to see a little reversal of roles and her trying to be helpful as he ventures into the waters of having a social life for the first time