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Once eaten, you no longer have it. Like having money and spending it all. Also, in marriage, security vs. freedom - if one cheats, they lose their security of keeping their mate.
She's married to Bob but seeing Bill. She can't have her cake and eat it too.
by Viola F. Blanton May 24, 2006

Words related to have her cake and eat it too

cake eat it risky self-defeating selfish