Mine is a real pain in the bum. She was really mean about me a few years ago, which luckily seems to have stopped, but she still drives me mad. She wants to plan things MONTHS and MONTHS in advance. Last July she wanted to arrange a weekend away for the first May bank holiday this year and was pressuring us to confirm. My husband has two friends due to get married this year, so he didn't want to commit and she got in a big huff about it. The next thing we know, she's bloody booked something and just sends the link. Then we get a message to say she'd been offered an extra night half price, so it's a three night trip instead of two, and "we can just finish work early" on the Friday. What, you're my manager now, are you? My husband just says "oh, that's just what she's like" and never says anything. It gets on my nerves.
There's never any consideration of the type of place we might like to go, or whether there's a particular part of the country that we'd like to visit. She just tells us where it is we're going. This one has water sports activities available - none of us participate in water sports!!! My husband refuses to drive, so I'll be the one getting us there. It pisses me off.
She likes to keep score of how much time we spend with each other parent. Both of our parents are divorced, so even if we spent two weekends with her each year (which is never enough for her), in order to be even we'd have eight weekends accounted for by parental visits and activities across the four of them.
The other thing is that everything always has to be a big group exercise. My husband can't just go to visit, I've got to go, too. Then she'll invite her husband's son and his husband. The weekend away is us, her and her husband, plus her husband's son and his husband. I like the husband's son and his husband, but it's like, she's always trying to make the big happy family thing happen. The offspring were all in their 20s when her and her husband got married, it's not like they were children and grew up together as step siblings. My husband's brother lives in Australia, and as always when we're with her, we'll have to have a big Skype call with him, a big group event. It's too much. There's a big "family" whatsapp group which is dominated by her and my brother in law's partner posting pictures of their baby. I'm not interested!! Then there'll be a snide comment about me not replying...
The brother is getting married next year - my husband and I have already agreed I'm not going, which will probably go down like a lead balloon - she's already making arrangements to get a big house for "us all to stay in" - that being her step son/husband, her sister's family etc. Maybe people want to make their own plans?!