15 Lessons Movies Can Teach Us About Cheating

Lesson: Infidelity and parenting don't mix.

Balancing a marriage and a sidepiece requires a lot of time and energy. Something is bound to fall through the cracks. As the affair between Ben (Kevin Kline) and his neighbor (Sigourney Weaver) unfolds, we see their kids left alone to make terrible and often disastrous decisions.