I live in a pretty small apartment with my partner & 2 small kids and we only have a 2 bed one being a normal double and the second being a box room as you can imagine storage is not exactly something we have.
SIL comes over once in a while but keeps leaving her shit in my house like shoes and clothes and her kids clothes and I've tried to politely say a few times can you please not leave things because I don't have the space. She didn't really like that and went and told DH and he comes out with put it in my wardrobe then just to piss me off.
She came over again and left a bunch of stuff in the dirty laundry for me to wash and then was like I swear I came with more clothes but I'm sure I fit everything and if I haven't just save it for me. I just feel like throwing it in the bin, I am sick of it!
I also think my DH should respect my boundaries in the house as he's not the one who does any of the cleaning or organising of anything. She is also the type to do this but 10x in her parents house.
Am I fair to say this is not your parents house and you can't just leave your stuff because you can't be bothered to carry it back with you. Oh and she also goes through my DH wardrobe without asking and just wears his stuff and I really don't like it, again I feel it's crossing boundaries but if I say anything it's like she wants to do it more. It's almost like she thinks she's proving a point.
My husband is a grown man and there's no reason his sister should be going through his shit in my home and leaving her shit for me to clean and store as she pleases.