I split with ex-h a year ago - I stayed in the house while he rented a flat about 5 minutes away. We have a 3yo dd and ex-h looks after her a couple of days a week while I'm at work. To keep the peace and make the split as pain-free as possible, I agreed that he could look after dd here rather than take her to his flat. Also that he could come round before I went to work so that we didn't have to wake dd up early (she usually wakes after I leave). He has a key and lets himself in in the mornings (he does knock at other times).
I do think it suits him - he doesn't have to buy food for dd because he uses what's in my fridge for her breakfast/lunch, plus he can leave all her toys here so they are not cluttering up his flat. He also gets to read my newspapers (I know that sounds petty but it bugs me!), watch my TV, fall asleep on my sofa (although he does that less now as he can't persuade dd to have a nap), even use my phone/computer (he usually asks first).
In return he does 'little jobs' around the house - actually that irritates me, as he's a control freak and I don't like being tidied up after - but again, I've not said anything because I don't want to have a row about it. He also occasionally mows the lawn in the summer - although only if I've not got round to it, and I'll admit that does sometimes save me a job, although I never expect him to do it and I'm happy to do it all myself.
Anyway, apart from the odd lawn-mowing, I've never really felt comfortable with him having such access, but like I said, I just wanted to keep the peace and be reasonable. I spent a long time biting my tongue and walking on eggshells when we were married and even now we've split up I'm still doing the same for fear of having a massive row and I don't feel as though he's properly moved out.
I'm now in the process of buying ex-h out of his share of the house, and he's in the process of buying a flat (not the one he's renting) about 10 minutes away. Would I be unreasonable to suggest that when we've both got our own homes that belong to each of us, that when we're looking after dd we do so in our own homes? And should I ask for the key back?
It would mean on the days that I work that either ex-h has her to stay over the nights before, or I go into work later after she's woken up - I currently leave at 7 and get back at 5 to miss the traffic but I could just as easily leave at a bit before 8 and get back at a bit after 6 - though that would mean ex-h giving her her tea.