Danielle,
I had Xray's during my radiation, I always hated that day the most as it took longer so that meant a longer time inside that horrible mask.
The last week of radiation was the worst for me. I also vomited a few times due to gagging on the thick secretions in my throat. I threw up a few times after treatment stopped also.
Be aware that your mom may hit a "down" spell when treatment ends, it seems to be pretty common. I know I landed smack in the middle of Depression land and it took alot to pull me out. This board was a huge part of my recovery from that stage of treatment. I felt like I wasn't doing anything to fight the cancer any longer and realized that for the rest of my days, I would be waiting at some level in fear of it coming back. If your mom hits this stage it is normal. My kids and husband were kind of thrown by it all as they thought I would be so thrilled to be done with radiation.
Chin up, sounds like she's doing awesome and has a great support system.
Minnie