[ Removed by moderator ]

(19F) Usually on Sundays after church, my small group goes out to eat dinner/dessert and hang out until at least one person decides to go home. My small group leader, Grace, usually pays for the whole group, and then everyone pays her back through Venmo or any type of payment exchange app based on how much our orders cost. For me, though, I'm the only unemployed member in the group so my mom pays for me. As payment for the previous week, this recent Sunday, my mom was feeling generous and gave Grace $200 in cash to pay for everyone's dinner altogether. Dinner didn't take place at a sit-down full-service restaurant though, we went to eat at an HMart food court since there was only 4 of us which is where things got tricky. Grace decided that we'd each pay for our own food, and that she'll use the $200 to Venmo us back based on our individual orders so we all agreed. My mom even texted me that I could order my favorite dish at HMart because it would be covered by the $200, and how she doesn't usually let me have it since it's expensive compared to other dishes (it's $25.67). So, I paid for my dinner and dessert with my own money, costing $32.07 altogether.

The next day, my mom got the notification on her BofA app saying that I spent $32.07 (she's my conservator so my card is under her account), and she asked what it was. Suddenly she got very angry, asking me why would I pay knowing that it's already been paid. I explained to her that Grace said to pay for our own food as she will pay us back using the given $200. But my mom kept saying things like I should've asked Grace about the payment plan, that I shouldn't have paid anything and blaming me as the reason for her frustration. She even threatened to remove my card if I paid such a price again. We're still waiting to hear back from Grace, but my mom is very much still angry. The way she's been acting lately definitely makes me feel like an a-hole. AITA?