After my wife and her husband separated, she was not supported by her husband, who is her sponsor and signed the Affidavit of Support. She lived with me and I supported her. She was in the USA for over a year, from November 2010 to December 2011, without the support he is legally supposed to provide. We have been outside the USA for almost two year in December. She is now my wife and we are in Germany right now. I'm aware he does not need to support her now, but isn't he responsible for the time she spent in the USA without his support, or is it already too late to sue him for it?