Hi Jonathan! Here's a couple of articles from the dog whisperer you may find useful.
https://www.cesarsway.com/dog-training/socialization/what-to-do-when-dogs-play-too-rough
https://www.cesarsway.com/dog-behavior/biting/nipping-nipping-in-the-bud
If she keeps it up despite your best efforts, you may wish to speak to a trainer. They'll be able to observe her directly to get a better idea of what she's doing. :)