Babysitting rates?

Kim72508

We asked one of DS's daycare teachers to babysit for us so we can get out with some of our friends for an evening.  When I asked her what she charged she said "Whatever you think is fair".  I have no idea what to pay her.  She's obviously background checked b/c she works in a daycare, she's early 20's, in college for early childhood education, medication trained, and knows a ton about his food allergies.  I feel like she's worth a million bucks!!!  DH thinks $10/hour is fair and I feel like that's too low.  $15?  What would you pay?  It'll be from around 7pm-midnight or so.  He goes to sleep fairly early.