I don't know if IABU but had a family BBQ tonight. I accidentally invited a cousin as I used an old WhatsApp thread. I didn't realise she was on the thread and wouldn't have invited her but she was on and replied saying she was coming. Fair enough - thought it might be nice as not seen her for a while. We used to be really close but just not seen her for ages.
She rocked up fairly drunk with her partner and 2 kids - they had been to the pub already - ate non stop - literally piling plates every time food came came out( she did bring her own booze - about 6 cans between her and partner - literally enough for a short stay). They both ate more food than everyone else put together. After 2 hours as the food was drying up they announced we are going now anyway - bye!
I was gob smacked and am really annoyed. Lesson learned and it won't happen again but aibu in thinking there are some cheeky fuckers around.I would never normally even notice but it was really blatant tonight. What made it even worse is that her partner referred to a recent party they had that none of us were invited to.