Woman Says Her Future Sister-in-Law Stole Every Period Product in the House — Then Asked To Stay Over Again

A newly engaged woman says she refused to let her future sister-in-law stay at her home again after the last visit ended with every period product in her bathroom gone and the empty boxes left behind like nothing had happened.

The woman shared the situation in a Reddit post, explaining that she is newly engaged and generally happy with her fiancé. The issue is his younger sister, who is in college out of state and had previously asked to stay on their couch for a few days while visiting their city. The poster said she knew the sister could be rude and bratty, but at first, she did not think it was serious enough to make a big deal out of. The original Reddit post is here.

That changed after the visit.

According to the poster, she has a rough time with her period and also deals with OCD, so she keeps very specific supplies on hand and replaces them each cycle. After the sister-in-law left, the poster went into her bathroom and checked the boxes she had ready. Every single one was empty. The boxes were still there, which meant at first glance it looked like everything was stocked, but the actual products had been taken.

That was what made the whole thing feel sneaky to her. She said if the younger woman had needed pads or tampons, she would have given them to her without hesitation. She even carries extra supplies in her purse in case another woman needs something. The issue was not that the sister-in-law needed help. The issue was that she took every last item, said nothing, and left the empty boxes behind for the poster to discover later.

When the poster texted her about it, she said the sister-in-law left her on read. There was no apology, no explanation and no offer to replace anything. Then the sister-in-law wanted to stay over again.

That put the poster in a tough spot. This was not a random friend she could cut off cleanly. This was her fiancé’s younger sister, someone who would presumably be in their lives long-term. But she also did not want someone staying in her home after taking personal items without asking, especially when the woman had not even acknowledged it.

Reddit was almost entirely on the poster’s side.

One commenter said they would not let her or “any other rudely behaved thief” stay in the house again. Another said the sister-in-law being rude would be one reason to ban her, but being rude and stealing made it even clearer. Several people told the poster not to soften the issue by calling it borrowing or a misunderstanding. To them, taking every product and leaving the empty boxes behind was theft, plain and simple.

Some commenters suggested she respond in writing so there would be a record. One person even drafted a possible message, telling her to explain that the sister-in-law had been rude during the last visit and had taken all of her feminine hygiene products, leaving her stranded without supplies when she needed them. That commenter said the poster did not have to host someone who made her uncomfortable in her own home.

Others said the sister-in-law should not be allowed back unless she replaced everything and apologized. One commenter said if someone ever steals from you once, you should assume they may take other things too. Another warned the poster to check the rest of her house because someone willing to raid bathroom supplies might also help herself to cosmetics, shampoo, clothing or other small items.

That warning turned out to hit close to home. In later replies, the poster said she had started checking and noticed other things missing, including travel-size perfumes and samples. She said she was especially mad because those smaller perfumes were not cheap and she bought them because she could not afford the full-size bottles.

A few commenters tried to imagine less malicious explanations. Maybe the sister-in-law was embarrassed. Maybe she was struggling financially at college. Maybe she had grown up in a home where she was allowed to grab household supplies freely. But even people offering those possibilities still generally agreed that taking everything without asking, then ignoring the text, was not okay.

Some people suggested a practical middle ground if the poster felt forced to let her stay again: remove everything valuable from the bathroom, lock up personal items, set up cameras or put out a small guest basket with cheap toiletries. But most commenters said that was too much effort for someone who had already broken trust.

The funniest suggestion was also one of the pettiest: give the sister-in-law a giant box of tampons for Christmas with a note implying she would not have to steal them next time. The poster joked in the replies that she loved the idea.

By the end of the thread, the advice was pretty clear: the poster was not wrong for saying no. Hosting someone is already a favor. Hosting someone who went through your bathroom, emptied your supplies, left the boxes behind and ignored you when confronted is something else entirely.

The future sister-in-law may have wanted another free couch in a major city, but the poster had already learned what that could cost her. And after finding empty period product boxes, missing perfumes and no apology, refusing another stay did not sound dramatic. It sounded like common sense.