My friend eats dirt. Should I tell her fiance?

I caught my friend eating dirt. She keeps a bag of sand in her closet. She says sometimes she gets really bad cravings for dirt, and so she will eat it. She is getting married in September. I am wondering if I should tell future husband. She said he already knows, but I don't believe it. Why would he stick around and want to kiss someone who eats dirt? I'm calling her mother tonight, because it's jsut too weird.She needs help. I'm just wondering if I should reveal it to her fiance as well. I don't want to ruin their marriage, but he has the right to know that she is a weirdo.
My friend eats dirt. Should I tell her fiance?
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