My mother-in-law, who has been married 4 times, has decided to get married again, to a guy she met online two and a half months ago. This marriage is to commence in two weeks. Based on her recent dating history, it could very well break up (with police being called) within this time frame. However, my wife says that he seems like a decent guy. I haven't met him. I'm all for finding someone to spend the rest of your life with, but doesn't it take longer than 3 months to really know fo...