Mary, the snarky troublemaker in me wants to suggest that you insert your foot into his nether regions with maximum velocity, but that will only make you feel better for five mintues. It's not a long term solution
Well, I'd ask you to think about what you'd say to a friend who just told you this. Imagine we're at lunch and I just told you that my husband got a DUI with another woman on his bike and now hangs out "his" bar and doesn't come home at night. Wouldn't you be thinking, "Wow, a DUI and he's still hanging at the bar?" or "Lord, he must be at that bar and spending the night with this other woman..."
Baby steps. First understand what's really going on here. Then think about what you'd want for your mother, daughter, or friend in the same situation.
Love.