I stole from my mother

My mom asked me to return a leather overcoat she had purchased a few weeks earlier. I took it to the store (one of the nice fashion stores) and they accepted the coat. No questions or problems and refunded the full amount. I told my mom the store only refunded the sale price because she didn't have a reciept and that the sale price had only been 25% of her purchase amount. I used the money to buy games, beer, and drugs for me and my buddies.  She believed me. She always believes me.