On the Dotted Line by Annabelle Marin

Valeria Valle is a twenty-three-year-old barista with a college degree, a tiny apartment, and a mountain of debt. When she runs into an old friend, she proposes a way for Valeria to solve all her money troubles, by becoming a sugar baby. Out of desperation, she caves and goes to an exclusive party to meet a potential sugar daddy. Valeria tells herself she is only doing it for the money, but when she sees Enrique Allende smile, she knows she is a goner.