You shouldn't joke about having an affair.
Saul made some new friends and is out at the bar with them.
Saul wants his new friends to think he is funny.
Saul makes a bunch of cheesy dad jokes.
Saul jokes about sleeping with another women besides his wife.
Everyone finds Saul hilarious and invites him out to a barbecue the next weekend.
Saul's new friends find it in poor taste and tells his wife whom threatens to leave him.