If you have a sister, you've probably driven your parents up the wall as teenagers with all the "borrowed" things you never returned and general squabbles that come with siblings in general.
But here's the thing, regardless of how much grief you may have caused each other throughout your childhood, it turns out you're much better off for having your sister in your life.
According to the Telegraph UK, a study conducted by researchers at De Montfort University and Ulster University has proven that growing up with a sister makes you happier in later life and more content.
As part of the research, almost six hundred young participants filled in psychological questionnaires that were then used to assess a range of issues, including mental health and happiness.
The study which surveyed 571 people between the ages of 17 and 25 found those with sisters tended to encourage siblings to be more open with their feelings if they had something on their mind.
Professor Tony Cassidy the lead researcher behind the findings said: "Sisters appear to encourage more open communication and cohesion in families."
"Emotional expression is fundamental to good psychological health and having sisters promotes this in families."
He added that boys tend to hold things in, bottling it up and as parents, we need to encourage them to communicate better.
"It could be that boys have a natural tendency not to talk about things. With boys together it is about a conspiracy of silence not to talk. Girls tend to break down."
And furthermore, the social scientists also discovered female siblings tended to more kinder, independent and motivated to achieve things in life.
So there you have it, the next time your sister uses your make-up without permission, robs your best dress or favourite pair of jeans or even does something to embarrass you, it's probably best if you forgive her fast.
In fact, you should probably be thanking her instead, just think about how unhappy you would be without her in your life.