Not sure to be honest. I have one younger sister to whom I am in theory, very close. BUT, we're not, hard to explain. She is very much the closeted younger sister, my parents support her each and every whim when on the other hand telling me off for being flighty (one career change). They see her as the independent one because she has a job that means travel, but help her out financially when I bought my own place, have worked since left school etc.
This isn't about my parents though, but it does impact our relationship. She genuinely believed she is entitled to whatever she wants, and feels hard done by if she doesn't get it. They will never put her straight, and 'enable' her by feeling sorry for her for various things that are all her own doing.
She is manipulative and very passive aggressive. She will purposely say 'spikey' things in conversation that are designed to get a response, if I ask her what she means by it she will act 'attacked' and my parents will dive to her defence and my attack. If she doesn't get her way with me she will run to them in tears (she is 27) and then they will be on the phone to me to tell me off...even if I was right because no-one is allowed to upset her.
I am not allowed my own friends, she will insist in being invited, has invited herself over to stay when I have people over and then say that they invited her. But I am not allowed to comment as that isn't fair to poor little sis. My friends see it, and DH has very ltd time for her.
I find it hard because I grew up with this dynamic of keep everyone else, in particular her, happy to the expense of all else. As such I revert to it as a matter of course, and simmer quietly. DH is trying to get me to be more assertive, but it is hard because then the whole family side with her. No idea how we got here to be honest. I often wish I was a little more like her, her sole priority is herself, despite this my parents adore her and yet rely on me as she is away so much. They are a little toxic though, as I am learning.
As you can probably tell, there is a deep well of something here! Am hoping to get referred to talk to someone about the deep seated anxiety my family have bred into me, but that is another thread.
She has invited herself to stay in Jan to see DD, and as she is staying in a nearby B&B I can't say no, even though the thought of her foisting herself on us for a few days makes my teeth itch.