Ahhh so sorry to hear that. If there's one thing I've learned from my years in medicine it's that cancer always hits the nicest of people, without fail.
I had a bad case of food poisoning the other week and it felt like hell. I can't imagine what your wife is going through with chemo etc. No one ever really understands what it's like unless they've gone through it.
Will keep praying for you and your family.