Potential issue if I, having been adopted, receive financial support from my former parents

Hello. Last year, my sibling and I were adopted by our aunt. We’re applying for a green card next year, and I understand that during that period, our mother isn’t supposed to send us money or have us use it. But a few days ago, without thinking it through, I bought a ticket to Korea using my mom’s card and then changed it to a Miami flight instead. The problem is that the Miami plane ticket was purchased using a card in my mom’s name. My cousin is coming to visit the U.S. this summer, and we planned to go meet her. Could this become a problem later when applying for the green card? If so, what should I do about it?