I don't know if you experience this at your houses, but my middle child is constantly playing musical beds. I believe the reason she prefers not to sleep in her own bed is she doesn't want to make it in the morning.
It seems the boys are onto her. Her older brother will not let her sleep in the bed unless she promises to make it in the morning. She has reneged on this a few times and so he has refused to reconsider her access. Now he says she will have to pay him. So she stuffs herself into the twin lower bunk with her younger brother. However, her younger brother is also onto her and has also decided to charge her rent. Daddy suggested six cents per night, but he decided he wants six DOLLARS.
Nighttime is a bit interesting as she tries to negotiate the rental fees. Just the other day I found this notice...the price is suspiciously the same as the rent... I like that it has its own web address.
Of course when I broke my toe and asked her to help me out she said "Hey! I should be getting paid for this!". Really? I asked her if she would like to see her bill of what she owed me and she agreed to work for free!
Why she doesn't just make her own bed in the morning is beyond me...or at least sleep on top of the covers or employ any of the tricks we learned as kids to make a less messy bed... I found this one this morning, so I don't think the negotiations are over yet...
Interesting...The frightening part is that they have this whole system between themselves and were it not for the notes, I may not even know what was going on. Right now it's just bed rentals, but as they get older it could be a lot worse. I hope they keep putting things in writing and leaving them around! Or, I can do what most parents this day and age do, just log-into their social media accounts and monitor them.