Perhaps you could wait to meet this young lady, since she will be visiting very soon. I'm not sure if you've met her, or had any sort of real communication with her yet, but it doesn't sound like it. Sometimes we fear what we do not know, right? It may be that she's a perfectly good young woman, who, God-willing, will get good spiritual direction from your son. It may be that our Good Lord placed your son in her life, to bring her to Truth.
I would say, wait to meet her, and, while being cautious, have a good attitude and be positive about her when you meet her. :smirk: