The situation is myself and my ex split up about 7 years ago. He lives with his mum and she won't let the DC go over there. Our DC are 17 and 12.
Ex picks up our 12yo 3 days a week. 2 days he just drops her home and one day he comes in and gets a takeaway for himself and the DC (sometimes I join in with this.)
He also has been seeing them on a Saturday. Sometimes he takes them out but often just hangs out at my house. As they have got older they do their own thing a lot on a Saturday so sometimes it ends up seeming pointless that he's here. And much as we are good friends I don't always want to be hanging out with him on a Saturday! (I do, do other things too!)
I'm thinking of suggesting he only comes over when him and the kids have planned to do something together.
Is that reasonable?