Mary Wagner is Keith's mother.
She, unlike her husband, is shocked to discover that Keith is dating an older woman, especially one of her patients, Bree Van de Kamp. Mary discovers that Bree is going through menopause, and uses this to her advantage, in an attempt to stop her son from seeing Bree.
- It is unknown why she has a different last name to her son.
Gallery of photographic stills released to promote the character.