Number Song

I've multiplied, I'm 2.
He was part of me
he came out of me,
he took a part of me
He took me apart.
I'm 2, he's my art,
no, he's separate.
He art one. I'm not
done & I'm still one.
I sing of my son. I've
multiplied. My heart's
in 2, half to him & half
to you,
who are also a part
of him, & you & he
& I make trio of
kind congruity.