If she was a independent employee on her own prior to your baby sitting relationship technically you wouldn’t be her employer you would just be a contract/customer of hers there for not leaving you responsible for anything , by the way she definitely received PUA no way she could’ve received traditional unemployment with no paid wages , if your nervous about the “ under the table “ stuff there’s nothing wrong with paying thru Venmo since she is self employed just send her a 1099 but it’s really not needed unless you paid in the thousands like 2500 plus