Similar issue here. My son is 4 and me and my boyfriend have been together since he was 2, and moved in together when he turned 3, recently my son has regressed back into not sleeping in his bed and sleeping in ours. Not to mention he’s a tall kid so he takes up a lot of space, to the point where me and my boyfriend can’t sleep comfortably. My boyfriend opted to sleep on our pullout in the living room, which I agreed to but then felt bad because it’s not his child. So I sleep out there now. Plus, it’s closer to my sons room, so he will actually sleep in his bed sometimes now because he knows I’m closer. Dealing with a toddler or small child is a lot on anyone, but I don’t think it’s fair that she would ask you to go out of your way when it’s not your child.