I don't have one myself so it's all a little new to me.
This phenomena called "sisterhood."
Most of the time they are inseparable.
Occasionally they need to be separated.
They are completely honest with one another about everything.
Sometimes a little too honest.
But watching these two work together for the past few months on their duet has been quite enlightening.
The things that are shared between sisters.
When they started their practicing, it was individually, each focusing on their own parts.
But then they came together.
And they had to learn to listen to each other.
And learn to be patient with each other.
And learn to support one another.
And they did.
And the end result was beautiful.