Mom babysitting my baby

I have a question for the mommas that have your mom or family member take care of your little ones. My baby is less than 2 months old and out of necessity, I had to start working and she offered to take care of my daughter and I asked her how much I should pay her and she said whatever I wanted to give her but Idk how much. Can anyone tell me how much you pay your family members to take care of your kids? It would be really helpful for me to have an idea.