Look in every man there is a past, although its either negative or positive. If you find yourself in that condition I advise you to seek her opinion on divorce or adopt children with her own consent because the case may be in reverse. Some people may have been worst than your spouse but luck was not in her/his favour. We are not God to change things, the deed is already done, so find the best alternative to live in peace with her. Remember is for better for worse. That other person outside is never an angel so look less.
Life is mystery that we don't understand till we meet him face to face