Amy - we have talked several times, and you and the Busse crew shared so much love when I was going through my tough time with my wife.
Happy to read things are on the upswing, and enjoy the joy when it is at hand.
In my belief (which does not have to be anyone else's belief), Jesus is closest to those who suffer. All suffer in this scenario, it is inevitable.
You have no need of my advice, I am just sharing some thoughts below (and they may sound trite). Speaking from my own personal experiences, they have held true.
Personally, I try to do my best to be a Faithful sufferer when times are low, and people turn away from their true selves. I pray for them. With all the meds and stress and lack of sleep all around, it is not unusual for very strange things to occur, weird accusations be made, etc. These are strictly unique and singular experiences for those going through them, regardless of others' experiences with a similar thing. It does bring you into the club nobody really wants to be a member of - the cancer club, although here it is. My prayers are with you, and join those of all the others.
My good buddy told me that when going into a new situation (even "just" moving to a new town), you can expect the unexpected, and expect others (spouse, parents etc) to be effected in even more and different ways than you are. Upon this change, some behaviors and actions on your part, and the part of others can be predicted. Others cannot be imagined and just come up (some people's reactions are baffling and can be over the seemingly most innocuous of things). This is all part of how humans deal with change, and some are equipped by training, experience or by the nature God has given them, or by all 3 to handle it better than others. You are clearly the Rock in this situation. I have learned (for myself), that as long as the love does not stop flowing between and amongst all (or most or just some at times!), the commitment to try and understand other's perspectives and the willingness to understand that you may never understand and be okay with that and let it go, and keep whatever your Faith is, all will be well, whatever the outcome. It is not easy always, and especially in such a super-charged moment as a cancer battle.
And, like others have said, even the mightiest of rocks can split by a little trickle of water over time. Good thing you are not a real rock, and are a Rock, and therefore can reach out and turn to others when needed. See there, you are smarter than the Grand Canyon (I think that was more than a trickle once upon a time, although it was still water)! Which makes you smarter by at least 4 times the Grand Canyon because it had like at least like 500 or a billion years to figure it out.
Edited to say my math was wrong: You are at least 6 times smarter than the Grand Canyon because I believe that I am 1.5-2 times smarter than the Grand Canyon. Whenever I call the shop and get you, you sound way smarter than me, and clearly have the Joy thing figured out. The Joy thing makes you smarter than many all by itself.
God Bless.
C