Marnie Simpson (née Bouvier) is the wife of Omar Simpson and mother to Lily, Magpie, and Brit Simpson. She is the British counterpart of Marge Simpson.
History[]
When Bart and his cousin, Brit, were mixed at the airport, the airport called Marnie to her cousin, Marge, and they decided their kids should stay one week at each other's house until the airplane can take them back.