My wife and I have been married for 8 years and two children (2 years and 4 years of age). A few days ago, my wife informed me she was pregnant; in addition, she stated the child might not be mine.  She apparently had an affair for a few months which she states she now regrets, but may be carrying someone elses child as a result.  I am not sure what to do.  Should I decide to get divorced, do I have any chance of getting full custody of my children (my wife states no as this typically is awarded to the Mother)?  She has been a good Mother, and I felt I have been a good Dad, but the fact of her carrying someone elses child is hard for me to deal with; let alone the father to be keeps calling me at work and home to inform me about the affair (I don’t want him to be around my children).