Cousin Mary is part of Peter Griffin's extended family. In "The Father, the Son, and the Holy Fonz", Peter's father Francis Griffin says that Peter hadn't embarrassed him so bad by founding his own church since Cousin Mary's wedding. At the wedding, Peter questions as to why no one is objecting to the wedding. When no one speaks up, Peter announces that the problem is due to genital warts.

Community content is available under CC-BY-SA unless otherwise noted.