Dear Prudence is Slate’s advice column. For this edition, Leah Prinzivalli , a Slate features editor, will be filling in as Prudie. Submit questions here. (It’s anonymous!)

Dear Prudence,

Recently, my mother-in-law came for a visit. I am seriously allergic to dogs and cats (I wish I weren’t!).

My mother-in-law has a Chihuahua, “Chari,” who accompanies her everywhere. She assured us that Chari would be staying with a dog sitter. Well, surprise! My MIL showed up with the dog in tow, claiming he “wouldn’t be able to stand being apart from his Mommy.” I ended up having to stay at my sister’s, and a cleaning service had to be hired to purge the house after my MIL and Chari left.

I am furious with my husband for siding with his mother over me. She lives three hours away, no

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