Sibling Rivalry Family Guy : Season 4 Episode 22
TV-14 FOX 22m int(0)
Aired: March 26th, 2006 @ 9:30 PM EST on FOX
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.