Good start. Make sure its 18 on the baptism, legal age you can sign a contract. Should be easy enough to prove to the court if she objects that bapping is a lifetime contract with the WTBTS under penalty of shunning.
Get a recorder for now if there arent any people around when you meet (provided you are allowed to record things per your state law). If you catch her one time on audio/video melting down on you like that it can be powerful court evidence.