Care and Feeding

I know they’ve never gotten along, but this is too far.

Photo illustration by Slate. Photo by Andrii Borodai /iStock/Getty Images Plus.

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Care and Feeding is Slate’s parenting advice column. Have a question for Care and Feeding? Submit it here .

Dear Care and Feeding,

My wife, “Ariana,” has never gotten along with my sister, “Candice.”

But when everyone got together at my parents’ for Labor Day weekend, Ariana had too much wine and insinuated that Candice had cheated on her husband because their 14-month-old is blonde and blue-eyed (my sister and brother-in-law both have brown eyes and dark hair). Candice was incensed and flung an entire bowl of potato salad on her before removing her family from the gathering and going home.

The holidays are not far off, and I really want to be able to see my family.…