So, I (32F) live in a house that I specifically renovated to be child-free. Not because I hate kids—I just value my peace, clean space, and adult aesthetics. Think white couches, glass tables, vintage vinyl collection, and a MASSIVE Lego Star Wars display that took me two years to build.

My younger sister (29F) has three kids (ages 4, 6, and 9) and recently had to move back to our hometown after a rough divorce. I offered to let her stay with me for a couple of weeks until she could find a rental, under ONE very clear rule: the kids stay out of my living room.

I even set up the finished basement like a kid paradise—TV, bean bags, snacks, and a whole bin of toys I bought just for them. But within 3 days, the 6-year-old had pulled apart part of my Lego Death Star “to see inside,” and the youngest had smeared peanut butter on my couch.

I freaked out—not yelling, but firmly told my sister this wasn’t working, and she needed to watch them better or start looking for other accommodations sooner. She got upset and said I was “valuing furniture over family.” I said I was valuing boundaries and that this was why I made it very clear from the start.

Now my mom’s calling me cold and says I should be more understanding because “kids don’t understand boundaries.” I say that’s exactly why parents are supposed to enforce them.

So… AITA for enforcing my child-free living room and not wanting my sister’s kids messing up my space?