It's irresponsible to renege on one's responsibilities.
John promised to pick the kids up from school.
John wants to catch the football game at his buddy's house.
John picks up his kids and drops them off at home and leaves to his friend's house.
John decides to go straight to his friend's house for the game, making up an excuse about being caught up at work.
John's wife expresses her love and gratitude which makes John feel very good about himself, and is able to watch the game in a great mood with no outside worries.
His wife discovers he was lying after she picks the kids up herself and this puts a temporary strain in their marriage.