If all she wants is $100, then let her take the $100! My parents watch my kids for free, I have always felt horrible about asking them for an extra day here or there because I don’t want them to feel they are taken advantage of. Sometimes it’s one day of the week, sometimes every day. I work night shift so a lot of the time it’s me crashing at their house for a few hours. They always have the same response of how seeing their grandkids grow up is worth way more than we could ever pay. That and my parents, even during retirement, make a ton of money That being said, I love the idea of an occasional gift card to treat herself too!