At the weekend partner has his kids round ,they're all teenagers. They share a bedroom as we're in a 3 bedroom place with two kids of our own but as but has tv and because it's bunk beds it's overly cramped. His youngest son will spend all weekend in our bedroom playing on his laptop and initially I thought it was for our tv as we have sky and they have freeview, and also if one of the other kids was watching something else he couldn't watch what he wanted to watch. But his dad noticed that he wasn't really watching it so could use our bedroom but doesn't need the tv on in the background. Didn't mind as he always vacated when I asked him to ,and would put a cover over the bed as he's a typical teenage boy who may not be the most hygienic sometimes. Anyway ,I've always said NO food in our bedroom ,they can eat in tiers as they're responsible for keeping it tidy but my kids room and mine are a food free zone. Last weekend I found a selection box wrapper and then the next day some more wrappings even though he'd even told not to (numerous times ). The times coincided with when his dad was out so now I feel he's sneaked up food which I think is worse than just forgetting !!
I've now said he's not allowed in our room and partners ok with this but I feel like I'm being a bit unreasonable but the other room is usually empty as everyone else goes out and of they're watching tv they watch on their laptops as they do catch up tv and netflix. I'm not overly close to them so don't want to seem I'm trying to mother him as he knows it isn't going to come from his dad (he'd live in squalor if it wasn't for me ). I've even in their lives for 6 years now ,I'm exactly the same with our kids so isn't like I'm favouring. I don't want to cause a rift if I am being unreasonable ...