You Jumped the Gun, Kiddo
What a shame. This poor daughter’s boyfriend, Dave, just broke up with her. Thankfully, mom has her back. She offered to take her heartbroken daughter out for ice cream as a way to overcome her crippling sadness of losing the love of her life.
But the girl made one huge error. She revealed her trickery before her mother actually made good on her promise. There’s no such thing as not going back on a deal when you haven’t delivered it yet. We don’t see a contractual agreement where mother dearest promised to get her ice cream, regardless of the situation.