Will Sims brake up if they catch their partner cheating?

Well, while my sims were in Selvadorada, the wife was in a flirty mood and decided to flirt with one of the locals. Her husband was just close by, and he had a "be jealous" interaction in his queue. Then he got a +3 angry moodlet (which was buried under a bunch of other moodlets at the time) and their romance relationship bar took a small hit. I imagine it would be worse if she did more than flirt.