Believe what you wish, but this is a damaged bag--that may or may not be authentic. Only competent authentication will confirm this for you. (Receipts are the easiest thing to fake.)
Sticking under a coat doesn't deform the Monogram pattern. Look at this fleur-de-Lys as an example, setting aside the obvious abrasions showing white. If it was just a wipe of some dirt on it, why on earth wouldn't she have cleaned it before taking photos? Ask yourself this.