As in get rid of a single bed & swap for a double, not change the bedding 
She's 18, wants a double, we have one that was meant to go into what would be her new attic room when it was done, but Covid hit, putting a stop to that work for now.
We have an extremely difficult relationship of late & she'll argue blacks white against suggestion I make, seemingly just for the hell of it.
Moving the double into her room & giving the single with attached sleepover bed away would free up a lot of space & massively help us with getting on with some of the work in the attic.
It will mean losing a chest of drawers, but these are to go anyway, as they are a bit flimsy for heavy adult use. She's raging about this, no amount of explaining that she'll have under bed drawers instead makes up for it.
She's insisting that we remove a built in table & attached dressing table instead. This is a complete pain, will mean redecorating & it's also perfect sewing & craft table for what will become my workroom, when she moves to the attic.
So we really don't want to do that, especially as it's likely to be damaged by ripping it out & then stored taking up space we need to move things around so we can renovate her room & bathroom. but she will not budge. Because of the way she can be with me lately, against anything I say or do, this feels deliberately awkward because she knows the table will become a work table for me. It's hard to explain, but she's generally very difficult & very often nasty towards me & I can barely speak to her without being accused of abuse
& saying no has her raging at me & trying to stir trouble with her dad. Possible ASD, but after asking or assessment, she stopped the GP backed referral at 17, so not diagnosed, though does have other probably irrelevant health problems
She's often at her BFs, & I'm of a mind that we swap to the double she does actually want & get rid of her singles whilst she's not her. It will help with space a lot & should only be temporary now we can get tradesmen in again & recycle other rubbish.
AIBU to just do it when she's not here ?
Genuinely not sure, but also really stumped by her stubborn assed behaviour that stops her getting what she wants, unless it's done exactly as she says 