Writing Conflict.

It's time to write since I am on break but I do not know which story I should write.

At first, I thought I should write out the stories that are the oldest and completed.
And right now, that story is a love story about Laura & Nathan. 
Laura & Nathan story has been completed and it's my oldest story (it's 6-7 years old).
I am so happy to have this story to be written because it is about time.

However, another story, Xerxes is being completely annoying because it keeps popping up begging me to write it.
It keeps popping up in my head, pushing Laura & Nathan to a corner.
Xerxes is crying and pleading for me to write it.

BUT it's really not his turn because it's only 4 years old and it's story is half finished.

I keep telling him to stop and wait in line because once Laura & Nathan is over, it will be it's turn.
But no...... he doesn't want to wait.
He keeps shouting, crying and begging.

And I almost want to just write about him so that I can make him happy.

But it's Laura & Nathan's turn.

So I am really confused and conflicted.

WHICH STORY SHOULD I WRITE?

Anyhow, what do you guys think? 
Maybe you can help me by voting on this poll that I have below here.

Which story should I write?

Xerxes

Laura & Nathan

Poll Maker