Welcome aboard! You made the right move joining the forum. The folks on this board are real pros.
Remember....
1. Give her lots of space. 2. No "I love you" and do not call her cute names. 3. No guilt trips - i.e. how can you do this to the kids? 4. Let her initiate most/all contact. 5. No cards, flowers, etc. - she doesn't want it now. 6. Focus on you and the kids. 7. No contact during the cruise. 12 days away may give her time to think about what she is walking away from. She may also see families enjoying themselves and want that back. 8. Patience is your friend in this game. If you push, she will file. 9. Sleep in guest room - for now.
The idea is that she has to come back to you.
It's Jujitsu.
If you agree with everything than that wall can come down because she no longer views you as controlling and argumentative. She will see the positive change.
She says she needs space - give her space. She wants you go to in guest room say "No problem." Everything is fine.