QuiltE

With that info, you might want to consider ........ what if she is not happy with your work, or your price, or any awkward situations that may come with you doing it for her .... then how might it affect the employer/employee relationship?

Or if you make these aprons for her, are you then setting yourself up for the rest of the staff to want you to do sewing for them too?

However, if you want to go ahead with it, perhaps your rate should the same per hour as this employee is getting!

All that said ... maybe it would be better to avoid complications and even conflicts, by saying no, before you are into something bigger and beyond what you want to be dealing with!