I agree with this. I worry for my DN (19 almosy 20) as my sister does smother her. I adore my sister and understand that she struggled to have her beloved daughter for a long, long time, but there are roles that need to be respected.
DN has friends, but not a best one, she has new friends at university, but not a best one: that role is filled by DSis. Since she started uni DSis and DBIL have visited every 2nd weekend, the whole weekend, for the entire year. DSis has been inconsolable most of the year and they speak multiple times a day. DN is not working abroad for summer/ going on holiday with friends, like we all did/ all her cousins are, she's holidaying with her parents and, right now, is out on a beautiful afternoon/ evening having drinks with DSis. She's never had a boyfriend and DSis likes it better this way.
DN buys into this, but I think it's because of the suffocating nature of what she's used to. She is full of personality and fun and should, in my view, be out living life as a 19/20 year old. She never goes out without DSis/ DBil arranging to collect her. She shops only with DSis. She goes out to eat only with DSis/ DBil. I get that she loves her parents, but it's all too co-dependent.
I know DSis silently disapproves that DS1, 18, is out constantly clubbing/ at gigs/ staying out all night at friends'/ going to different cities/ festivals. She reacted very strangely that I'm 'allowing' him to go on his first lads' holiday to Greece🤔. There is no allowing about it. She can't get her head around why he works until 10/11pm and he gets the bus home rather than me collecting him. And, by the way, I'd be the same if he was a girl. I did all of the above, as did she.
It's not my place to comment, but my other sister and I are concerned it's all very claustrophobic.