Matthew Koma and Ashley Tisdale Lester Cohen/Getty Image; Bryan Bedder/Getty Images Share on Facebook Share on X Google Preferred Share to Flipboard Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Send an Email Print the Article Post a Comment Hilary Duff's husband and singer-songwriter, Matthew Koma, is weighing in on Ashley Tisdale's recent essay in The Cut, in which she explained that she had to leave her "toxic mom group.