I have two cousins with kids of a similar age (8/9 years old). Let's call them Danielle and Lola.
Danielle's son has a chronic health condition - it's very sad - he has lived with pain every day of his life, and often has to use a wheelchair due to fatigue etc.
My partner also has the same condition, to a less severe degree, but they have really bonded because of it. The boy talks to my partner about how he's feeling etc and they have become very close as a result, it's lovely.
In summer we took him away on a short holiday, at our expense, to give Danielle some respite and also enable her to spend some time with his siblings who often don't get the attention they need. We have also taken him on a couple of day trips etc since then.
We live a long way away and so when we visit my family, we make an effort to see Danielle and to support the relationship between my cousin and partner. Danielle and I were close as kids, we were in the same class at school, so we have a natural sibling-like closeness, whereas Lola used to live a long way away when we were kids, so I only saw her occasionally.
The problem is, Lola has now become very jealous because we haven't given her child the same level of attention, spent as much money on her etc. She's started behaving in quite a passive aggressive way towards me, not responding to messages, putting public posts on Facebook about 'how it feels when family make an effort with other family children but not your own' which are clearly directed at me - although she hasn't said anything directly to me.
It's a difficult situation - because we live so far away, the truth is that it is hard to make time to see both cousins when we visit - and it doesn't help that they are currently not speaking to each other due to a fall out, so we'd have to see them both separately.
Their kids also don't particularly get on, so it's not like we could have taken them away together - Lola's daughter has some behaviour difficulties and is very energetic to say the least. Danielle's son, being quite poorly, finds her intense to be around. We love her but truthfully it would be a lot for us to take her away, and we are just not as close.
Lola also doesn't reach out to me very often at all. The last time I saw her was when I travelled up last year, taking annual leave especially to surprise her for her birthday. Since then, I am being accused of 'not making an effort' but she hasn't contacted me once since then to ask how I am etc. Whereas with Danielle, we talk and support each other.
I just don't know how to respond/ what to do about this situation. AIBU to not be going out of my way to spend money and time on Lola's child? Is she behaving immaturely or am I being unreasonable?
It's not that I don't care about them, but the truth is that the connection just isn't the same and it is very hard to foster that when we have such limited time to visit. Danielle's son has such a difficult life that he really needs any extra help he can get.