Crap. The woman didn't "choose" to be impregnated. We're beyond "being reponsible for your own actions" and into the land of "you will be a vessel for the pleasure of a cretinous rapist'. No thanks, this is not a very libertarian thing to force a person to do against their will.
No, we're in the land of "Don't rip a small child's limbs off because the father was a punk."
No thanks, this is not a very libertarian thing to force a person to do against their will.
Ah. When did it become libertarian to prefer the murder of small children?
You can't unrape someone.