Sibling Rivalry

Overview

Peter gets a vasectomy and loses all his sex drive. Lois begins to gain weight, and as a result, Peter's regains his interest in his wife. When Lois' habits get out of control, she has a heart attack. The surgeon must remove Lois' fat to reach her heart, returning her to her normal weight. Meanwhile, Stewie's half-brother Bertram returns to confront him, where they have a war for control over the playground.

Guest Stars

Wallace Shawn

Bertram (voice)

Wally Wingert

Principal Sloan (voice)

Tara Strong

Little Baby Girl (voice)

Nicole Sullivan

Nurse at Sperm Bank (voice)

Phil LaMarr

Morgan Freeman (voice)