I posted last week about my daughters father celebrating mother's day with DD(5.5) and his girlfriend. Now I think he's planning to take his girlfriend along to parents evening with him. I'd asked if he wanted me to make an appointment at any particular time so he could get there from work, assuming we'd go together as we're fairly amicable. He said he wasn't sure what time so to just get latest possible appointment. I got the time slot letter today and it had DD's name and mum in brackets. Teacher said DD's dad has made a separate appointment an hour earlier - a time which allows him enough time to go and collect his girlfriend. They have only been together a year, DD has seen her probably twenty times at most and I'm getting fed up of them trying to infer she's DD's parent too. I let the mother's day thing go and didn't say anything but think taking the girlfriend to parents evening instead of us going together (particularly when we have joint concerns we'd discussed sharing) is taking it too far. AIBU?