I have agreed to pay my aupair for every bus journey she does which involves my kids inc if getting bus home from dropping kids at school and getting bus to school to pick up kids. She uses an Oyster card which she loads up and I transfer money into her bank account. I have just found out that she has walked some of the journeys but I have been paying her the bus fare. I am a bit annoyed. It is obviously her choice to walk so I shouldn't pay her bus fare if she hasn't used the bus surely??