I think they would like nothing more than to bust up the marriage and drag you back in the cancer. Then you will have to drag her into the cancer in order to have any chance of marrying. Then, they will tell you that it is not good to marry too soon after baptism, and bumble that out while they are waiting for someone else to take her out from under your feet.
From there, you are game for that Value Destroyer Training School. I definitely recommend you to avoid that at all costs! And, if you don't believe me, then talk to SnakesInTheTower about it. He was in it, and can back up my claim that it is not worth going to.
Instead, I suggest getting married anyways. In a church. If certain family members cannot make it because of the Filthful and Disgraceful Slavebugger, they are the ones that are going to lose out.