Dear Prudence: "I just found out my dad's sleeping with his best friend. What should I do?"

In this episode of the Slate-sponsored Dear Prudence, a “Disturbed Daughter” asks for advice on what to do about her father after she finds-out dad's in a relationship with a man.

Prudence makes a throw-away joke about Brokeback Mountain, but then gives sound advice:

"It's none of your business."

and

"Be glad your dad has another person in his life."