Lois' pregnant sister inspires her and Peter to have another baby.

Peter and Lois go to the Pewterschmidts for the weekend, bringing Brian along. Brian, meanwhile, has some "issues" of his own to work out. Find out if Brian's future is to make puppies or become "less" than he is.

Brian becomes a substitute teacher at Chris' school after his teacher wins the lottery. When Brian is moved to teach a class of troubled kids, Chris falls in love with his new teacher, Mrs. Lockhart, who promises to love Chris only if he kills her husband. When Lois finds out, she and Stewie decide to teach Chris a lesson.