Is AUTHOR wrong in the post ? POST : This just happened. I'm selling sunglasses at a market stall and a lady is shopping for herself but a husband is there. She finally decides on the two she wants for $30. As I'm packing them up for her she starts saying things like ' I'm not sure if I've got exactly the right change.  30 is it?'
This isn't for my benefit. She's trying to trigger the husband to reach for his wallet, which he does. Just as he moves his arm to his back pocket she starts rummaging through her handbag for her purse, slowly pulling it out and searching all the compartments (all the while side eyeing her husband, insuring he gets the cash out first) when she gets $50 note out she holds it against her purse with her thumb as he's holding his fifty out to me.
I've seen women pull this move hundreds of times. 
I stall serving by saying to her 'oh that's right I've got some lens cloths for you in the car just a minute'. When I come back to the table I come back much closer to her than I do him. I grabbed her $50 instead pretending I didn't see his, foiling her plan to avoid paying.
AITA?