How do you deal with your parent's infidelity?

I didn't deal with it very well, because my dad tricked me into being an accomplice. I was 14 when this happened. He told me (and my stepmom) that we were going "night fishing". We loaded up his truck with the gear, but then he drove to some woman's apartment and made me sit in the truck the rest of the night. When we came home, he made me walk through my younger sister's wading pool, so I'd have wet shoes and pant legs. I carried that weight around for a couple of months before their marriage mercifully disintegrated and ended. In the meantime, I started drinking as just a way to cope. Not exactly "father of the year" material.