Her Mom Came

I went on a date with this girl, who ended up bringing her mom. I didn’t know right away but then I saw her making what she thought was covert signals at a woman by the bar, so I asked.
She lied at first and then admitted that it was her mom. She said she brought her mom on lots of her dates so they could gossip afterward. I got up and left before dessert arrived. I figured her mom could pay for her dinner since I was the entertainment.