Would you expect the host parent to return him/her or assume that you would do it yourself? My son's friend has come round for a rare sleepover. I invited him for 4pm. When she dropped him off his Mum asked what time she should collect him. When I said "11" she repeated it in a surprised way as though it was too early. She then asked if she was to collect or if I was returning him. When I told her that she could pick him up she joked that I was "lazy". I do feel a bit out out. I think 4 pm until 11 am is plenty of time. I would always assume that it was my job to collect my child from a visit. If the other parent offered to return him I would be grateful but never expect it.