Keith's wife is a woman who is the wife of Keith.
Homer and Marge decided to look for new guardians for their children, in case something would befall them. The Simpson family drove along the beach, looking for someone suitable. He noticed a young couple without children. They look perfect, so Homer softly hit them with his car. However, after Marge had learned that they are from Mid-Atlantic, the Simpson family quickly drove away from the couple.