When my daughter-in-law Brittany asked me to babysit my grandson Noah for the weekend, I expected cuddles and cartoons—not an invoice for eggs, water, and toilet paper. Despite our strained relationship and her obsession with “boundaries,” I said yes out of love for Noah.

Her house was chaotic—no baby food, barely any diapers, and a sink full of dishes. I cleaned, cooked, bathed Noah, and kept him happy all weekend. On Monday, I found a note: “Please Venmo $40 to cover food, water, and paper goods.”

Stunned, I responded with my own invoice: “Grandmother Services, Est. 1993,” listing $200,000 worth of unpaid parenting to raise her husband. With a 99.98% family discount, the remaining balance? $40.

I sealed it with flair and left it at their door. Soon after, Brittany sent me the $40 “to settle her debt.” I laughed and donated it to a children’s hospital in Noah’s name. The best revenge? Clever and classy.