Sirius/Serious

I swear one of these days I'm gonna snap
And you there will be the first to go
'Cause you wear that stupid little smile
When all the while the world is crumbling at our feet
Get ready for a side of me that you don't wanna meet

Sirius, why can't you be more serious?
You have to know your childhood days are long gone
I'm delirious, playing mom to you
Just how old are you?
At least try to play along
Be more serious

You know I would do most anything for you
But oh, it's the way you test my nerve
That takes me way over the edge
Losing sanity allegedly mine
Can't you find a better way to spend your time?

Sirius, why can't you be more serious?
You have to know your childhood days are long gone
I'm delirious, playing mom to you
Just how old are you?
At least try to play along
Be more serious

Sirius, I know you're serious
But sometimes you know you just don't let it show
I'm delirious with all I have to do
But taking it out on you is not the way to go... But

Sirius, why can't you be more serious?
You have to know your childhood days are long gone
I'm delirious, playing mom to you
Just how old are you?
At least try to play along
Be more serious