I am always looking into approaches for cancer given my brother has been battling it for several years now.
I have no idea what's possible.. in addition to treating the sepsis, which of course has to come first -- by the way a wonderful product, which, in my opinion is even better than activated charcoal is carbonized bamboo. According to the Japanese, this not only absorbs toxins but doesn't absorb nutrients the way activated charcoal does.
Supreme Nutrition is a great company I feel, and you may want to look at this entire website with that in mind:
But, as I was saying, my mind goes to building up her immune system -- perhaps even larger amounts of intravenous vit C?... has this been discussed at this forum?... mega doses of vit C for cancer?.. also C60 (Clif High recommends Purple Power C60 since they're trustworthy and cheaper brands don't work).
Speaking of Clif High and C60, I just discovered Clif High's small series of Youtube videos that he did when he was in the midst of treating his own cancer (which so far he's been successful at). I haven't finished watching these, and he does go on personal tangents, but if you stick with it he does provide the science behind his approach as well as protocols. C60 is mentioned as very effective for cancer along with vitamin C... it seems your mother should never be without vitamin C in her system in sufficient amounts. He also mentions medicinal mushrooms, and other vitamins, as well as a very specific type of yogurt culture (which isn't cheap apparently). As I said, I've not finished watching these, and he will no doubt get to whether the yogurt culture part of his protocol is worth pursuing or not. I have noticed he starts to look better as the videos progress.
Anyway, here is a link to his "Cancer Ward" series. He's just getting warmed up here in the first one, not only discussing vit C primarily, but dealing with his anger in a way that seems crucial to his recovery. He provides more protocol type information in number two, possibly more than that in number 3, etc., as he progresses with his own research.
But I keep thinking your mother needs to fortify her immune system, and these videos will be dealing with that.
Clif High is very resourceful.. not sure where this little series leads to, but I imagine he has quite a few potentially new insights to offer.