Thanks for the suggestions.. All I have on hand at the moment is some Hydrogen Peroxide that I'll dilute and swab with tonight. Tomorrow I'm going to go on a pharmacy run for hibiclens and betadine. I also have a gigantic aloe plant that I can use. Hm.. I guess I can move her tank into the room where my frog lives. It's much warmer, AND that'll keep her further away from Houdini.

Shannon, that might be what it is; her eyes don't seem affected, but the cheek area under the eye is incredibly swollen.

One more question... Would it be a good idea to go ahead and swab my other snake's mouth with some hydrogen peroxide as well? I ask because I'm almost 100% sure that, while I've been gone, my mother has been using the same tongs and probably even offering leftovers from one snake to another, because she hadn't noticed the infection on the little one. I really don't want anything to get started up with him because of his age. Also, his eyes are always a little bit cloudy (cataracts I think. been that way for over a year) and it'd be more difficult to spot an infection.
Also, I'm guessing I shouldn't be feeding her while all this is going on??