My partner has married adult children. We have been together for 5 years.
They turn up to our home most weekends unannounced and stay all weekend and don't lift a finger. They help themselves to food, the washing machine, the iron, toiletries, food and drink including going through every available cupboard. They leave cushions on the floor, cups everywhere, recycling everywhere etc etc. They bring nothing and contribute nothing.
They even comment that they don't like going to their Mum's as our house is nicer! They literally lay on our sofa all weekend.
They don't seem to want to spend time alone with each other as husband and wife at the weekend.
My partner and I work all week and then have them here all weekend unless we go away for the weekend, we don't get quality time together. Even then, they turn up at ours knowing full well we aren't even home.
Firstly I want to spend time with my partner alone in my own home at the weekends at least some of the time and secondly I hate their attitude of entitlement and lack of manners and respect.
My partner, moans about them to me but says nothing to them and gets defensive if I suggest having a word with them.