I closed my joint account and split the money and I recommend you do the same. Since she is seperated, she needs to be accountable for herself.
During the next two weeks, it is your job to monitor the situation with her, but try to avoid yourself initiating any deep R talks. If after the 2 weeks, she decides to move back to Germany for good, it probably serves you best to seek out some legal advice. If it comes to that, I can recommend a great lawyer in Portland that I used for my D - he even tried to get us to use mediation to save ourselves money.
I cant understand your W in wanting to move away from her own kids. I had the fear early on that my W was going to take my kids back to Thailand.
Keep a positive mind set through this.
BTW... Congratulations on quitting the addictive lifestyle of on line gaming.
