New Mom Is Furious After Her Husband Let His Sister Babysit the Couple’s Infant Without Telling Her 

A new mother is furious after learning that her husband allowed his sister to take their 4-month-old out of the house without telling her.

In a post shared on Reddit’s AITA forum, the mom explained that her sister-in-law — who lives in the same building — has watched their infant only a few times, and always for short periods while remaining close enough that the parents could intervene quickly.

But after returning home from an appointment, the mom was shocked to discover that her baby wasn’t there. Her husband then casually informed her that his sister had taken the infant with her while running errands.

The sudden revelation sent the mom into a panic. She told her husband she wasn’t okay with their child being taken out without her knowledge — especially by someone who has only cared for the baby indoors and has limited experience with infants. Their disagreement escalated into a heated argument.

She added that her sister-in-law has previously joked about throwing water on the baby when he cries, gets upset when the baby cries with her, and often takes the baby out of the mother’s arms without asking — behaviors that have already made her uncomfortable.

Reddit users quickly weighed in. Many commenters criticized the husband and sister-in-law for making such a significant decision without the mother’s consent.

One commenter wrote, “Your SIL has no business taking a 4-month-old to run errands. He’s not an accessory or something to be dragged around away from a parent.”

Another questioned whether the baby was transported safely and pointed out the importance of proper car seat installation and safety measures, worrying about the risks another adult might overlook.

Some users suggested that the mom’s feelings were understandable — especially with a first child — but advised caution about setting a precedent where every minor parenting decision requires her approval, as it could lead to carrying the entire mental load later on.

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