Posted 2 hours agoHilary Duff's Husband, Matthew Koma, Called Ashley Tisdale The "Most Self-Obsessed, Tone-Deaf Person On Earth" As He Brutally Mocked Her "Toxic" Mom Group Essay"For anyone who's never been in a Facebook mommy group before...this is it."by Leyla MohammedBuzzFeed StaffFacebookPinterestLink Hilary Duff's husband, Matthew Koma, is hitting back at Ashley Tisdale French's viral "toxic" mom group essay.