That probably shouldn't happen but it all depends and how you use it and treat it. Not that she is abusing it but the way each person treats their device is going to be different. If scratches are a concern there are plenty of options for screen protectors out there.
I usually go for them and I am glad I do because although I don't think I abuse my devices the screen protectors show damage that otherwise might have been on the screen itself.
Thank you for your response! It does seem like she uses it quite leisurely. Have you had any experiences with any protectors? She attempted to use one called Armorsuit on Amazon which seems solid thus far. Thanks for your help!