Have you spoken to her about why she made that choice and expressed your feelings to her about it? What is the status of your situation and what has led her to looking for other men online while being married to you?
This is a concern that all couples grapple with when going through a divorce. As best you can I would try and talk with her if you are on speaking terms to work out an agreement for what works for both of you around meeting other people, introducing them to the kids and sending photos. You may also want to reach out to the attorney so that they may want to put these kinds of things in the divorce agreement.
Have you spoken with the attorney about this?