I hired a "mother's helper" to help me out in the evenings when my husband is traveling for work. I have one child, under age 1. I will be home with her the entire time. I hired someone who is 19 yo, much older than the typical mother's helper, because I need her to pick up my daughter from daycare (so she has to be a responsible driver).

Because she's older, and driving, I am paying her a bit more. But am I paying too much? I offered her $15/hour.

If it is too much, am I stuck? How do I "re-negotiate"?