She (57F) left me (56m) after 20 years. Not really an explanation for why, just all my fault. Question is, now after 7 months of separation, the kids (all 3 mid to late teen girls) staying with her, We are close to a Separation agreement but she is insisting that she is entitled to back support. I have been giving her some money for the last 3 months but she left without getting an agreement first. I have some people telling me she is not entitled to any. I'm just not sure what NYS says. We have been going to arbitration to keep costs down and this is really the last sticking point.