AITA: My sister used all of my shampoo to make slime and I got angry?
A teenager was left shocked after discovering her expensive shampoo had completely disappeared overnight. The culprit turned out to be her younger sister, who had used the entire bottle while trying to make slime for an online trend. The situation quickly turned into a family argument when the older sister expressed how upset she was.
The shampoo was a high-end product she had been carefully using for months, hoping to improve the health of her hair. Replacing it would not be easy, especially since she had saved up to buy it herself. Meanwhile, her 12-year-old sister had used it all in a single attempt at a slime recipe she saw online. What made the conflict even more frustrating for the teen was her parents’ reaction—they brushed off the situation and accused her of overreacting.
‘AITA: My sister used all of my shampoo to make slime and I got angry?’
The poster explained how her haircare routine relied on a product she used sparingly.
The problem started after the younger sister tried a slime recipe she saw online.
The situation became even more frustrating when the teen realized the slime experiment failed.
Conflicts over personal belongings are common among siblings, particularly during teenage years when independence and ownership begin to matter more. In many households, these disagreements reveal deeper issues about boundaries and accountability.
In this situation, the older sibling’s frustration is understandable. High-end personal care products can be expensive, and using an entire bottle without permission crosses a clear line. For a teenager who saved money or carefully rationed the product, losing it all in one experiment can feel like a significant loss. The fact that the slime experiment failed likely intensified the frustration, turning the situation into something that felt wasteful rather than accidental.
On the other hand, younger children often experiment with trends they see online without fully understanding the value of the materials they use. This is where parental guidance becomes important. A balanced approach would typically involve acknowledging the older sibling’s feelings while also teaching the younger child about respecting others’ belongings. Moments like this can become learning opportunities about responsibility, empathy, and the consequences of using someone else’s property without asking.
Here’s how people reacted to the post:
Many commenters strongly supported the teen and pointed out the cost of the product.
Some users shared balanced perspectives and personal experiences with similar family situations.
![[Reddit User] − NTA but your parents reaction is pretty much standard for my house too, when I was young. Your shampoo isn't of any value to them,](https://en.aubtu.biz/wp-content/uploads/2026/03/wp-editor-1772955095430-8.webp)
A few commenters reacted with humor and disbelief at the situation.
This story highlights how small household conflicts can quickly turn into bigger arguments when people feel their belongings and efforts are not respected. For the teen, the frustration came from losing something valuable that she had carefully used for months.
At the same time, younger siblings experimenting with trends can lead to mistakes—especially when they do not fully understand the cost or importance of what they are using. Do you think the teenager’s reaction was justified? Or should situations like this be treated as normal sibling mishaps that families simply move past?
