AITA for not giving my co worker the money for the shift I covered for her?

My (16m) coworker texted me and asked for the money that I got for working her shift. This is my first job so I don’t know if I’m in the wrong. I need money to pay for a car accident and was happy to pick up my coworkers shift when she asked me to. The day after the shift she texted me and said “I think they accidentally gave the money to you even though it was my shift, do you mind sending me it by venmo?” I think she’s just trying to gaslight me into giving her my money but I’m not 100% sure. I asked my parents and my mom said give it to her while my dad said it’s my money so I’m at a stand still. AITA here?

Edit: I told her I’ll ask the general manager what to do and she said no just keep it. I asked him anyway and he said he‘ll talk to her and that’s the last I’ve heard from either of them as of now

Edit: I think she got fired. After I asked the general manager she texted me and cussed me out for telling him.