Done!
I had trouble with "flay her", since she's still wearing her dress (you guys never said to take it off ;P), so I debreasted her by flaying her breasts. With the blood loss from that and ripping her arms out of their sockets, she's pretty close to dead, so I don't think the odds of her managing to chew herself an air supply before passing out are very good (particularly with the neck strap on its current setting). So it seems like it's time to start thinking of how to finish her off for the round...