The Fortress of Amber's Heart

Your heart, it must be quite large,
To fit the room for me,
And then there's the cats, who you love,
And who love you and me.

But also, you have room in there
For several little dolls,
And it seems you never lack the space,
In the chambers of your heart's halls.

And while we're making less space
To surround us, as it goes in verse,
Your heart is ever expanding,
Like the ever expanding universe.

The only difference, you'll see
Is that your heart will never collapse,
And as long as you have two sturdy legs,
You'll have dolls filling your laps.