I, personally, would not bring it up. She's going to tell you what she thinks you want to hear. I would just let it go for now. There's nothing you can do about it except create an even deeper divide between the two of you.
Keep the focus on you and your children. This is a business deal that is going south and you have been invited on a trip that you didn't want to take. Try to remember, you can't control anything she does, says or her emotions...the only person you can control is yourself and how you react to everything. Who knows, she may have wanted to see what your reaction would be to the photo. Time may very well tell you more. Sit quietly and trust me, the answers will come.
One more thing...this situation w/your spouse is between the two of you. Try not to involve others in the situation because, if, at some point you both opt to try again, it will make it harder for her to return if family and friends know about what is going down between the two of you.
Keep that focus on you and dig deeper for patience.
