What is wrong with my wife? Please help!

married for 15 yrs and have 3 kids. A week ago she told me she's in love with someone else. This someone else turns out to be an individual who is famous and located across the world. She is into Wiccan type practices and says they communicate spiritually. He doesn't have any social media but she swears he has Twitter and FB. She says he leaves messages for her through Twitter and FB. She has already packed her bags and says he is coming to get her and our kids. All of this was out of nowhere. I'm really at a lost for words and would love any type of advice. I have no idea what to do.

Right off the bat, I'm concerned for the safety of your children and wife. Who has she been talking to? Is it really this famous person? Chances are it isn't, and if this person knows where they live then I would be concerned. What's also alarming is how your wife decided she loves this person and has been communicating with them, while she is married to you. And now she has also decided all on her own that she is going to take your kids when she leaves - across the world. I don't know if your relationship has been deteriorating or if this is all so sudden, but it's clear that she isn't taking much responsibility for her actions and is thinking of nobody's feelings except her own. I would also be concerned that your wife has some sort of mental issues. Maybe this is something to get a therapist involved with.

AGREE!!! BL, get yourself to a solicitor or family law courthouse (ask for the court clerk) *NOW*.