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I informed my wife about my desire to end relationship and that I'm going to start separation process. I suggested that we sit down and try to sort at least some issues with kids, since we have 3 (2 of them are in custodial age.) She refused to talk and believes I'm pressing her to try to negotiate things as we are still in the marriage.  I took a copy of all documents and signed for single parents class.  I found a sublet for 3 months till Sept 1, when new school year starts. Is it right to move there and file separation paperwork after that, or it is better to file, while we are still physically under the same roof. I afraid that the latter could be risky, since my wife is emotionally unstable and had cases of past domestic violence w.r.t. me and our older child. Since sublet is temporary, I have my full intent to get at least 50% of the custody and try to get to arrangements for new school year. Any advice is appreciated