I have posted regarding my family situation before and specifically my dad and his girlfriend. My dad is now back in a relationship with the woman he had a long term affair with when I was in my late teens. This culminated in my mum having a breakdown and ultimately and very tragically she killed herself. The woman would not back off whilst my mum was ill to the point where my dad did not in fact have anything to do with her for the next 6 years. Anyway, they are now back together which causes obvious issues but myself and my siblings try really hard to maintain a meaningful relationship with our dad. I am expecting my first baby in October. The gf booked a trip with my dad to Tanzania before I announced my pregnancy and so they will be away for 3 weeks over my due date. I was upset by this because obviously my mum won't be there either but I completely understand that it was booked beforehand and apparently has cost thousands and cannot be moved. My dad never actually told me but I found out from my sister on the quiet, then the gf took great delight in telling me saying well you don't need him so it's not a problem you will be busy and also pointing out that she doubts they will have any mobile signal or WiFi for me to contact him. Her approach has really upset me. My dad was there for both my sisters babies and cancelled (smaller) holidays for this. Tellingly she had actually booked these holidays knowing my sisters due dates. I feel very much that my dad should have told me and that I shouldn't have been accosted by her with the information making out like I've got no right to be upset. AIBU?