Is Colon Cancer Catching?

I received an email from a married couple that both came down with colon cancer at nearly the same time. The husband has an extensive history of surgeries for other reasons, and the wife has a resistant case of c. difficile. I would love to hear from any other couples out there who have both been diagnosed with colon cancer near each other. As far as I know, no one is researching this particular aspect of colon cancer.