Sometimes you have to get tough what I have found that has worked is that you take her to bed when it is time read her some stories, tuck her
in ,lots of hugs, outside light if she wants, then leave her, no going
in and out,
children do get mixed messages and if you arent consistant their clever little brains latch on to it, they know you will go in to them, so if she comes out tell her or take her back, just do it,quietly no fuss, Unless she sleeps in the evening or during the day she should