Ahh, the dreaded uni-brow. This, like the mullet, must be eradicated by any means necessary.
It doesnt really matter what you use (with the exception of 6 month old, rusty razor without comfort strip) so long as you rid the woman of the uni-brow. Normally I would reccomend tweezers, but that would imply she has no aversion to plucking. Someone with a brushy thick uni-brow, has probably never seen tweezers EVER. I suggest you wait til she is soundly asleep and then with a sharp new razor, shave the area until she awakens.
Then run like hell! Do a forum search for "go bags" so you get an idea of what emergency supplies to pack as you will no doubt be on the run for a while.