When my daughter-in-law, Lila, asked me to babysit Oliver for the weekend, I gladly agreed. Though we’d never been close, I loved spending time with my grandson. But when I arrived, the house was a mess, the fridge nearly empty, and only five diapers were left. Still, I managed—grocery shopping, cleaning, baking cookies with Oliver, and soaking up every sweet moment.

By Monday, I was exhausted but happy—until I found a handwritten bill from Lila on the counter: $40 for eggs, water, toilet paper, even laundry detergent, with a note: “Please Venmo by Friday.”