If you have brow bossing, you will have brow bossing after hormones too.
You will need a surgery to remove and fix it.
If it's little brow bossing, it won't interfere with your passing though, against to what people always say, girls can have somewhat brow bossing and even quite a bit of it (emma watson being one example and there are people with much more that is shown more on profile too.)
But it's rarely as much as is common in men (men can have quite a bit) and probably never as much as as Hugh Laurie (House M.D.
http://en.wikipedia.org/wiki/Hugh_Laurie )
That being said, if it's little you might feel a bit of an ape but will be able to pass.
You must do facial hair removal though, laser or electrolysis.
If you have little hair you can hide it with make up (worked for me before lasering, and when coming to a support meeting people asked me if I am ftm before testosterone sometimes due to my boyish choice of cloths - other people thought I'm just any other girl)
Fat moves around the face, muscles disappear in the face too, skin changes and ta da! you look girly.. or something weird.
It might be enough but you might have to turn to the help of surgery. (chin, nose and forehead being probably the most important skeletal parts in the face, I think people usually over-do the jaw thingy)
Examples of beautiful women with well defined jaws:
http://www.comicbookmovie.com/images/news/superman/karafirst2.jpghttp://upload.wikimedia.org/wikipedia/en/3/3e/Remyhadleypromoseason6.jpg