Care and Feeding July 08, 20261:00 PM Photo illustration by Slate. Photo by Getty Images Plus. Care and Feeding is Slate’s parenting advice column. Have a question for Care and Feeding? Submit it here. Dear Care and Feeding, My sister-in-law gave birth to her first child a few months ago, and I’m deeply concerned about my niece. The father, my new brother-in-law, is anti-vax and generally defiant when it comes to health and safety precautions. My sister-in-law wasn’t like that before, but she now defers to him on absolutely everything and has absorbed all of his ill-informed opinions. Neither of them had any prior experience with children, and I’m the only family member they have who does. There are too many concerns to get into here, but after a recent visit, one that stood out is the lev