Ever see this pattern...
Young brother hits 18-20 and his hormons are on overdrive. He can not find someone in the congregation, so he sneaks out and finds a 'wordly girl' who thinks sex before marriage is ok and normal. So he feels this is a way to deal with the hormones and basically, goes sex wild on her and hopes no one finds out. However, something happens, he feels guilty and also thinks that this sex belongs in marriage. He ask this girl to marry him in a short time, and since he is probably one of the most polite men she ever met and good, she says 'yes.' This engagement is used with the elders in confession to make things right and hopefully avoid a disfellowship event. Even promising, that the girl has promised to 'study' and perhaps become a 'witness.' The elders pass over on disfellowshipping and instead do a reproof. The young man marries the girl and soon realizes she has no desire to be a Witness, and was just doing what she thought he wanted. Soon, he can see he can not control this situation the way he wants and wants it to end ... guess what, too late she is pregnant. In the divorce that soon follows the birth, she uses the religion against him in custody and the story goes on.
I saw this repeated many many times ....