To let DS sleep on the floor

[theluckiest]

My 4 year old DS received a playhouse tent type thing for Christmas and was immediately smitten. Spent much of yesterday collecting ALL of his toys inside playhouse which is now set up in his bedroom. Put him to bed over an hour ago...just checked and his bed is empty. He has disappeared into playhouse along with his duvet and a few cushions and is fast asleep. AIBU to leave him in it? Technically he is sleeping on the floor but looks perfectly comfy. He will, I'm sure, immediately inform his teacher when he's back at school that he sleeps on the floor and I will be mortified.

(It does look so comfy though. I am considering climbing into it myself tomorrow and hiding there with my kindle and a bottle of gin....s'pose that may slightly BU particularly as I'd no doubt have to evict DS from playhouse first)

My DS, now eleven, sleeps anywhere but in his bed. Under it (it is a high bed), in his wardrobe on the top shelf above the hanging space, in a tent he made himself out of the clothes horse, downstairs on the settee (often) in the dog bed, in the cupboard etc.
I shouldn't worry about it. Mine is far too big to put back where he is meant to be, so I gave that up ages ago and he seems quite comfy.