Becky and her son, T.J., are a small family that Peter and Stewie meet in "Single White Dad". The patriarch, named Scott, is deceased.
After Peter fakes Lois' death while she is bedridden and becomes a local sensation for singlehandedly parenting his children, Becky offers Peter and Stewie a playdate at their home. While the boys quickly hit it off, Becky becomes enamored with Peter, whose personality reminds her of Scott's, and the two decide to make their playdates a regular thing. Becky reveals that she is in love with Peter and kisses him, also offering him sex at her place, but her love is one-sided, as Peter is only pretending to be a single father so he could enjoy the perks.
Peter attempts to break things off before Lois can find out, but Becky invites herself over and introduces herself to the Griffins. Despite Peter's best efforts, Becky finds out the truth upon meeting Lois, and is hurt that Peter lied to her. After he admits to his wrongs, Lois tells Becky that she can do so much better than Peter, prompting her to leave so she can do just that.
Becky is voiced by Rachael MacFarlane.