some of us are not lucky to marry the girl you know. sometimes family friends/family etc hook the possible bride and groom up and they go from them. No body can be after someone all the time to know what's in their head and also people change , even after marriage. yes, 98 percent of the marriage might still last in Nepal and we are really lucky in that sense. but you never know when you're victimized by a gang. and technically yes, she can bang and boy next day of marriage in front of you,as long as she doesn't provide any proof and file a divorce and property claim right after that. law is law. and thats the law of Nepal