Per Mark Snyder at The Paper That Shall Not Be Named, Gwendolyn Bush, who is the mother of Stanford CB Wayne Lyons, has been hired as the director of player development. On Twitter, she referred to the position as "team mom". I think we can safely assume Lyons is coming.
Harbaugh must've gotten to know her while recruiting Lyons. Also, apparently Lyons is a great student and really good kid, so I'd assume the apple doesn't fall far from the tree.
EDIT: So, it sounds like she was also the "team mom" for the South Florida Elite 7-on-7 team that featured, among others, Amari Cooper, Geno Smith, and Teddy Bridgewater. All those guys apparently loved her.