OT Last Night

I was out yesterday alone without kids looking for wrinkle removal and Chrsitmas presents. OMG the city was very busy yesterday. I spent more than five hours shopping and I did not manage to finish. On the way home our supervisor texted me if I want to do a shift for last night. I wasn't interested at first because I was very tired and my legs were aching. But then when I rang her she said it will be an overtime rate. So inside the taxi I was computing how much I will get. Hmmmm 2 hours for 1 1/2 rate and 10 hours double pay. Even if I was tired I said yes. How can I say no with that rate? I need the money!!! :D