Here's mine. Me and my inlaws live in the same apartment building so we're all isolated together. I get along with my MIL, she's a kind, sweet lady who never interferes in my life and loves our kids.
My SIL is another matter. She has mental problems and is a very bitter and toxic person. She spends no time at all with my kids, even though she's the only aunt they have in this country (my family is all in the UK) but if we ever run into her coming or going, she acts like the best aunt in the world, fawning over them.
SHe's never extended any help to us despite her own kids being grown and gone from home and her hving taken early retirement. Deespite this, life is always against her, people are always mean to her, it's always everyone's fault except hers.
My biggest issue with her is that once my older DS received quite a bad lifelong diagnosis, she bailed out of our lives completely. Never checked up on us, never asked me how I was coping with something so serious.
She's my DH's only sibling, and he copes by grey rocking and just listening rather than letting it go in.
Christmas day we'll have to see her at my MIL's. I'm consoling myself that it's only a few hours, then she can go back to ignoring us like she does 364 days of the year, despite her acting like a loud, over the top magical Mary Poppins aunt to the face of my kids and her latest litany of complaints about how the world and everyone in it has done her wrong. They're not fooled though!
Who else?