When I was younger I always knew my younger sister was the favoured sibling, it was just demonstrated in numerous ways throughout my childhood and teenage years. It has continued into adulthood ie their successes are celebrated and mine barely notes. I've managed to ignore this as much as I can, but it is noticeable and does hurt.
This weekend we had a family celebration, my 'favoured' sibling and her DH behaved very rudely, refused all food and hospitality as they had eaten en route, turned up late, gave mono syllabic answers etc etc, just generally acted as if didn't want to be there. This behaviour was noticed by all my in laws who were asking me what the problem with X and her DH was. I Mentioned this to my mother after everyone had left, and she flatly denied there had been any attitude problems, how it was fine to decline all hospitality, and in no way rude that they had they had eaten en route, they were friendly and chatty with everyone. I'm just bemused how my mum doesn't see it, or either lies about it not happening.
Why does this happen, what can I do, this last episode had irritated me disproportionately and I'm sick of ignoring this behaviour now 