There’s a lot of Stiles being really serious anytime he talks about his mum, but consider, they have the same sense of humour and she’d be proud as hell at any shitty jokes about her. For instance
Derek: did you look a lot like her? It sounds like you take after her a lot
Stiles: well… i don’t have many pictures of her, but I got at least one on my phone. Be nice, okay?
Derek: of course
Stiles shows him his phone. It’s a photo of a fucking urn
Stiles: She’s self conscious, she’s trying a new look
