He amuses himself with a sexual encounter with another male student while Ivo is lecturing elsewhere for a day. On Ivo's return, preparing for a regular trip to Alaska where Tim will accompany Ivo, Tim admits this to Ivo, who cannot suppress his anger and punches Tim.
He engages in a private, consensual same-sex encounter with another student while Ivo is away teaching, and upon Ivo's return, Tim confesses this to Ivo, who reacts with intense anger and physically assaults Tim.