Jonathan Koppenhaver, aka War Machine, was jailed for life for attacking ex-girlfriend Christy Mack in 2014 after finding her in bed with another man
Ashley Farrington, 30, began writing to him behind bars shortly afterward
The pair then got engaged in February after Koppenhaver wrote her a poem
In it, the 36-year-old writes: 'I want to be your hero, for you I'd gladly die'

War Machine's love poem, in full
To: The Love-of-my-life,
I feel a pain inside
The love we share brings me to tears
I'm desperate to fully express it
But there aren't adequate words, nor will I live enough years
For this is an eternal love
One I feel I have always known
Even if only in my dreams
Or, perhaps, in the marrow of my bones...
Were you once in me?
What did God do?
Did he cut me open
And make out of me, a you?
Is that why words fail to express
And why I feel that, for you, I must bleed?
I want to be your hero, for you I'd gladly die
You must know that my love is true in deed
And here we have the greatest mystery solved
Of why Christ came to die
Words must have failed him too
A man needs his love to know he's no lie
And so he came and bled
For you and me and Coben too
Words fail all true love
And that's why, Ashley, I wish I could die for you