3 sharing a room? Right or wrong?

[SnowLeopard6]

So, my gf and I are about to all live together. Her 3 children, and my 2. Into my house. We are planning to have an extension built. But in the meantime we are going to have to squeeze in.

My concern is this:
The youngest 3 are going to have to share a room. My 8yr boy, and 5yr daughter, and my gf's 8yr old son.

The room is currently my sons. My daughter will be giving up her room for my gf's teenage daughter. My children stay 2 nights a week and every other wknd. Gf's son will be in the room most of the time apart from every other wknd at his dads.

So every other wknd they will all be in the room, and 2 nights during the week. Rest of the time it'll just be my gf's son.

This is the current plan anyway - I'm not sure I'm comfortable about it. In reality the extension will be a year away, we having had drawings done yet, nevermind the build process.

Is it fair on them to share? Is it reasonable? Feel worried that my children will feel like it's not their home anymore. Like they are just coming to stay in someone elses bedroom. It will be my gf's sons bedroom most of the time. I can't imagaine this will be very nice for them. Equally I appreciate my gf's children will no longer be in their home so strange for them too.

Please share your thoughts on this. Good and bad. Can't quite see the wood through the trees if you know what I mean. Am I over thinking this?

Thanks for all your concerns, all kids are in their teens and happily don't seem to be having any problems. Believe me they are all quick enough to complain if the broccoli texture isn't just so, so I'm sure I'd hear all about it if the sleeping arrangements weren't satisfactory

We have just been through a large building project involving significant structural work, so similar to an extension.

It takes a while to get builders. They are often booked up for 6 - 9 months ahead.

Costs escalate massively. We had rebuilt a house before, but even with our experience found that it cost more than we thought. Raw materials have gone up a lot in the last few years. Fifty became eighty in the blink of an eye!

The build itself will be stressful, with clouds of dust throughout the house at times (yes, even if you think it is all blocked off!) and builders in your personal space.

We have a large-ish house, so plenty of space to use, and found it stressful enough without going through family upheaval at the same time.

Please think very, very carefully about this.

8 or 9 weeks ago you thought your partner was either deliberately drawing the attention of other men or leading you to think she was irresistible to others to mess with your head. Now you're blending families...

No wonder you're so defensive - you already know you're in the wrong.

I know its been addressed but I would put he girls together.

You say the overlap is only a re days here and there due to EOW arrangements. The 15 year can put herself to bed quietly for those few nights. Sleep oversaw etc can happen when your daughter isn't there.

Bunkbeds in both rooms to maximize floor space. DdDDhas limited toys at yours anyway I presume and only a small 9collection of clothes.