This may get long so I'm going to just stick with the main points.
I had a good relationship with my sister up until I got married and had my own children. From retrospect, I think the thing that changed was that I started to resent having to look after her children all the time. Before me getting married she'd leave them with me all the time (without asking, just dropping them off) and I'd look after them happily.
Things changed when I realised I was being taken a fool. I'd come home from work in the evening and find crisp packets and food on the living room floor....dishes in the sink.... We lived with my dad and she'd waltz her kids there after school to make a mess and then leave. I was always told it was dad's house and she can do whatever she wants. Except I was the one having to clean up after her mess.
We had loads of fights and arguments. We stopped talking for months and then she moved away for 6 years. In that time we'd make friends and then fight about something again. She'd keep blocking me off Facebook and telling me not to write comments on her photos...or delete my comments. Really petty things.
Over the 6 years she's been telling her 9, 12 and 15 year old about every little disagreement and argument we have had to the point of showing them the messages we've exchanged. when she makes friends with me, my nieces and nephews are normal and loving with me again...but when we argue, they turn cold and rude to me. Gradually they're turning more and more cold towards me.
I love my nieces and nephews but I was being taken a mug when I used to give up my spare weekends and time to look after them. I had to stop it.
I'm in a situation where I don't know whether I should keep in touch with them forcefully, or just let them be?
All I know is that my mum had differences with her siblings but she never told us their exchanges until we were much older and could judge for ourselves...sister has been poisoning their thoughts since they were 3,6 and 9. And it's not just against me, it's also against my other siblings and aunts and uncles dsis dislikes.