So I kinda made this account on Mercari and won $5. I bought something from it, and now it’s shipping in a USPS truck. Here’s the problem. I’m only fifteen, and my mom doesn’t like sites like those. Now I’m stuck between telling her and just lying about it but I don’t want to lie so the only option I have left is to explain but I’m nervous. What should I do? How do I do it? I don’t know how to reverse this, and it’s too late to reverse the shipping…