I am so sorry to hear of your wife's illness. If I understood your post correctly I'm guessing that she just gave birth to twin boys?! That itself is wonderful but of course it makes life more complicated for both of you right now and I hope you have family and friends and a religious community available to help you through what might be a difficult time.
This forum is a wonderful place as well for both you and your wife (when she's feeling well enough) to seek support. Most of us are cancer patients (myself included, I have Breast Cancer, but am cancer free and don't need chemotherapy).
I live in NYC and so I go to Memorial Sloan Kettering for treatment. I am a (retired) trained Medical Librarian. I sometimes do research for people who need it. I can see that you are overwhelmed right now understandably. I also noted that you live in Florida. I think that the Florida Hospital Cancer Institute might be a good place to start for you and your wife unless you are able to leave your babies with family and travel a distance and stay for a longer period of time. Even this might be a distance from where you live. Their URL is:
www.floridahospitalcancercenter.com. I have not heard of them before. I searched "Cancer Hospitals Florida" in Google and this is what came up. There is also a branch of The Mayo Clinic (which is a very fine highly rated hospital [their main hospital is in Minnesota]) in Florida, but I'm not certain as to whether they treat colon cancer. You may want to contact them and check. The two best search engines I use are Google and Dogpile.com (which is all the search engines included in one). By the way, I'm a (retired) trained Medical Librarian. I do not offer Medical advice, only referrals - to books, hospitals, doctors when I can, and recreational reading. Your wife may want some fun things to distract her. If she does, either you or she can contact me and I'd be happy to refer you to some.
Take each day and even if necessary, each hour as it comes so you are not so overwhelmed. Find soothing music for your wife to listen to. Skip the news with all the murders, etc. so your wife doesn't have to think about that. Have her watch funny shows on tv. Be happy with your babies.
Hopefully they caught her cancer early and things will be ok. It will take a bit of time. You're not alone here. People on this site understand what you are going through and certainly your wife as well.
If you want me to give you a more comprehensive or inclusive listing of Cancer hospitals throughout the country, I can do so, but upon hearing you just had twins, I thought you'd want to stay local.
My congratulations to you on the birth of your sons!! Next step to get your wife well!!
Wishing you peace, calm, strength, in difficult times and for your wife my best wishes for her complete recovery!