I Invited My Best Friend on a Trip, but She Insisted on Bringing Her One-and-a-Half-Year-Old Son

We were going out for the weekend, and my best friend, who had recently gotten married and had a baby, insisted on coming along. We'd agreed not to bring family, but just before we were set to leave, she suddenly said she wanted to bring her eighteen-month-old son. A little later, she said her mom was worried and wanted to come too. Then she said her aunt also wanted to tag along and look around. My friend made a small group chat, and her aunt started making all kinds of demands. She complained that our itinerary wasn't fun enough and that the attractions were too difficult to climb with a stroller. In the end, she even said my car was too small and demanded that I pay to rent an expensive luxury SUV. Another friend coming with us couldn't take it anymore and messaged me privately: "