I'm coming at this as the sibling who is treated less favourably than the others but would also be interested in what it's like for those of you on the opposite side of the fence.
I am one of 6 children and it's no secret that I am mum's least liked child. I won't bore you with a long list of examples but it includes things like being left out of family stuff and generally being made to feel very unwelcome. Even at our dad's funeral they left the church together to travel to the wake and left me to make my own way there. I couldn't drive so my dad's sister and her family took me under their wing for the rest of the day.
The funeral incident was something of a turning point for me. I realised that if they couldn't be there for me on that day of all days then they probably wouldn't be there for me at any other time either. I came to terms with this and now accept that this is the way things are. I get on with my life and let them get on with theirs. I've been careful not to say anything bad about my family in front of my own children and have encouraged the friendship between my children and their cousin (my sister's child) who is a similar age to them. They only see each other a couple of times a year but get on well whenever they meet up.
After their cousin's latest visit though my children have started to ask some awkward questions. Their cousin has innocently mentioned some of the things she does with her grandma (my mum), things like visiting grandma's house, staying overnight, going on trips to the park or into town. Now mine are asking why they don't get to do any of those things. I lied and said that grandma was busy but my 8yr old asked how come grandma still had time for their cousin. I'm afraid I took the coward's way out and changed the subject and now I'm just keeping my fingers crossed that they will soon forget all about it.
I'm fairly certain though that the issue is going to come up again at some point. What do I tell them? I like the fact that they do at least have some contact with their relatives so am loathe to stop it all together.
Am I risking damage to their self-esteem or do you think it's possible that like me they will eventually just see it as being one of those things and get used to it?
(I've changed names for this thread so have been deliberately vague with some of the details)