Divorce is no more common among pilots than other professions. In fact, aviation careers don't even fall into the top 15 careers with the highest divorce rates.
Whether or not your wife can "handle" you being gone is up to the two of you. But it is my opinion that if she chooses to leave you because of your job, your marriage was doomed anyway.
And as the guy above me who makes so little money said, when divorce among pilots DOES occur, it's probably more due to attitude than the job itself. Pilots tend to be driven, precise, knowledgeable, and perfectionists; things which often do not lend to improving a marriage, or which tend to drag their spouses down.
If you're not being an a$$hat to your spouse, and they leave you with the excuse of you being a pilot and often gone, then you probably married the wrong person.