@Theresa1121
I underwent 40 rounds of radiation for b/c on my left breast; I worked FT when being treated.
Your friend may want to consider wearing a soft cotton cami in lieu of a bra; she may experience radiation burns (I did). I used face cream on my burns, which healed up after treatment.
I wore Soma cotton mastectomy bras (available online or in stores), but felt most comfy in camis-no rubbing on sore bits while healing.
Your friend will be very tired as radiation tx proceeds and her immune system will be compromised. Consider helping w/premade meals and other assistance for her.
I hope she has a full recovery and you are a caring friend!