First off, I completely understand, not my children, not my rules! Equally I'm not a parent myself, and I appreciate that! I know how easy it is to discuss when I don't know the reality, but this seems beyond the norm, hence my post.
Relevant background - I'm 20, and went to uni a year and half ago. I live there full time now, coming home for short visits over uni breaks. I sadly lost a set of twins last January, who were unplanned, but I knew about prior to the loss. It has devestated me, and I'm sure this has affected my judgement - hence the AIBU post!
I have three younger siblings - 8 year old twin girls and a 6 year old little brother. They are lovely, sweet, articulate polite etc, as much as children that age can be! What concerns me when I come home is what appears to be a complete lack of parenting - mum and dad go to bed at 10, and give the children no direction whatsoever. They aren't told to go to bed, asked to brush their teeth, tucked in etc etc. At half past midnight tonight, all three of them were still awake, playing on their iPads and watching TV. I said it was long past their bedtimes and they said they weren't tired yet. Of course that's a typical response from children at this age, but I think it's true in the sense that they have gotten into a pattern of very late nights. This isn't just a one off behaviour, this may be a bit later but when I lived with my parents and when I've been for visits in the past they have all been up past 10 pretty much for each visit. It's not unusual to find them passed out on the sofas in the living room with the TV still going and lights on the next morning which I find so sad.
Something I remember from my childhood and I see being replicated with them is a serious lack of healthy habit formation - they are never encouraged to drink water throughout the day, wipe after going to the toilet, wear seat belts in the car, or brush their teeth. Growing up I knew about these things, but thought like me that most children didn't actually do any of them. I'm so concerned but all of this. The 8 year olds still wet the bed, not due to a known medical condition but because nobody ensures they go to the toilet before bed or makes sure they don't drink too much.
I'm struggling so much because it's not my place to intervene, and I'm not around enough to implement anything meaningful, but I see how damaging it is. What do I do? Am I being unreasonable? Is this normal?