I think I would ignore the undressing too. Just wait til time is up, do your cuddles & sorries, then redress her as if you didn't even notice.
When its warmer, it won't matter so much & she might forget all about it if she has hardly any clothes on to remove, lol.
Maybe put some felt or something under the chair legs too, so it doesn't scratch the floor
:yeahthat:

She is doing something she knows will get your attention, ignore the behaviour completely, and she will move on to something else. Ignore that too and eventually she will simply do what she is told.

The other thing, when she is apologisig, make sure she says what she is sorry for. Otherwise she will simply learn all she has to do is offer an empty sorry and not actually learn what behaviour it is that is the issue. So if she threw a toy, make sure she says "sorry for throwing the toy" or something similar if she can't say all the words yet lol

GL