I can’t think of specifics because I’ve watched a lot of hallmark style tripe and it’s a recurring theme.
But has anyone else noticed that festive films are the one place step parents are portrayed as an almost universally good thing?
Single dad meets single-minded career woman, they fall in love over a hot chocolate after a misunderstanding, the adorable kid is smitten with her on sight and they’re all happy ever after within a week type of thing.
They exist in a world where any woman happily jacks in her job for a handsome hopeless bloke, so I’m not saying it’s all positive 
But I started to notice it a while ago and might not be alone in thinking it’s interesting.