Not specifically Teen, but now my eldest is an adult, theoretically

[TuTru]

I have an 18 yr DD and then a 10 yr old DS and an 8 yr old DD.
So my girls have shared a room, however I feel now my oldest girl is technically an adult and often nocturnal or noisy & other stuff that 18 yr old girls are, I would prefer it if the younger two shared that slightly larger bedroom. They have more in common, play PS3 and watch TV together etc.
Is it worse for an 8 yr old girl to share with an adult than it is to share with her brother of a similar age.
The oldest wants to move out in a year or so, so by the time the others are teens, there'll prob be separated.
What would you do?

I would also put the youngest two in together. You can always reasses the situation when either of them hit puberty or your older daughter moves out, but this sounds like the best solution for now.

Yep. Agree. I think it makes sense :)

I'd probably share with my 8yo DD. Other solution is ok, too.

I'd put the 2 younger ones in together too.

Oh wow I am so glad of these replies. When I mentioned it to the youngest twos dad he was all against it, and I wasn't sure if what I was thinking was a good idea or not.
I'm more confident about it now.
So grateful for all your opinions x