It's bad to not honor the promises you made.
Ann promised Marie they would go out to lunch together, but Ann doesn't feel like going out.
Ann wants to take Marie out for lunch.
Ann decides to go anyway since she made a promise and Marie was looking forward to it.
Ann tells Marie that she's sick to get out of her obligation, even though she isn’t, and reschedules for a different day.
Ann ends up having a good time and doesn't regret going.
Marie finds out Ann lied and gets angry with her.