No no no!
Did she roll it all the way back and expose the head? You can roll it back a bit but then it gets stuck. I've done this to clean up a really pooey nappy. If she has forced it back all the way before it's ready then she could tear it and that could cause an infection.

I have one 6yo that can't roll his back at all and doesn't want to cos he says it hurts. And one 4 1/2yo that has rolled his back and for the next few days he said it hurt when he weed. It's fine now though.

There is no way I'll be forcing Mason to roll his back any time soon.