I"m not sure I could stay....

for crying out loud she was battling CANCER. the time when she needed the people she loved the MOST and he decided to fool around and POSSIBLY father another child? I understand that an illness such as cancer can be very trying for the spouse but honestly I don't think I could help but think "Does he really care that little for me that he would deceive me during my weakest moments?"

If things got bad for her again would he be searching for another woman to be with?

People that cheat (man or woman) in my eyes are SCUM. If you want to sleep around BE HONEST and tell your spouse you want out. Easier said than done? Well how easy is it when your spouse finds out you are a whore?