Tonton Streaming Metalocalypse (2006) S1E6 - Dethfam

Uncomfortable and embarrassed, Dethklok painfully endures while their parents are in town for a visit. They are at first pissed and doubtful when their parents announce the release of the 'Parents of Dethklok' album, but soon realize the depth of their parents' anger. The guys learn an important lesson: there's nothing more brutal in this world than raising children.