Improv of "The Promise"

I decided, after reading Sharon Olds' poem "The Promise," that I really liked the last line: "...if the ropes/ binding your soul are your own wrists, I will cut them." So I extended it.

...if the ropes
binding your soul are your own wrists, I will cut them. But,
merely fraying the braided wool laughs
at the quaking desperation
of my fingers.