Kyle sighs. "I went on this whole stupid crusade," he admits. "Ostensibly over cruel humour, but it was REALLY because I was pissed off about Heidi going back to Cartman and turning into an awful person. And then they all said I was acting just like my mom, and that made me even angrier.

"But it's true, I WAS acting just like my mom. And I feel like I was using Heidi as another prop in my endless fucking war with Cartman."