I am about to get married in couple of weeks. The marriage was arranged through a matrimony site. Apart from the typical bride inquiry through common people, what else can I do for bride's background check? I am mostly interested in knowing about her character, things like if she is involved with someone, or if she was involved with someone before? ... This is something that will affect my future life if there is a third person. I had actually asked her, and she had said no to that. But I feel like i am gambling.

I need advise as to what I can do to put my fears to rest? .... and worse, if I do get married, and there is a third person, how do I handle such a situation? I don't think I will ever be able to trust her, if the start of the marriage is based on lie.