She's doing well - chemo's hard on her, but you know what a fighter she is. I have no doubt she'll get through this with flying colors!
The thing that may be of interest to you is that we went through all this stuff 10 years ago with my dad (who is still cancer free), and the advances they have made both in effectiveness and patient comfort are unbelievable.
So be of good cheer, this thing CAN be beat, and your mom WILL do fine.
My prayers are with her, and you.