djestone

Hello,
So my wife and I got married in 2012 and we got the approval of her temporary green card in 2013. Out of no where this last week she came to me, said she didn't love me as much as I loved her, packed her stuff, left, filed for divorce and now we are going to the courthouse in a month to dissolve the marriage.
I am heart broken and devastated, but the more I thought about it, the more I thought that I was being used. She has been shallow and cold with me since she came back from a trip in Europe and talked about how she wanted to move there and teach. She is currently studying so she is really focused on school and always was her main priority.
My question is someone recently told me that she will actually still be able to stay in the country after her green card expires because she can file to immigration claiming our marriage was in good faith. I tried doing some research to find out if they will need to interview me and if I can make my case that I felt used and people are telling me that I actually won't be involved. Is this true? If so, is there anything I can do, contact USCIS or file something to add to our file that I felt used? I am already feeling extremely guilty that she is still able to stay here until summer 2015, but if she can actually in the long run become a citizen just through a year and 10 months of marraige, then how has this policy not been changed!? It seems like it would be too easy for internationals to fake love someone for two years, divorce and not even go through the interview phase after the temporary green card has been issued.
My last question is that I am her sponsor and so are my parents, is there something they can file to remove ourselves from that title? Do we still have any responsibilities for her? Would this help our case against her to stay in the country?
Please, any help is greatly appreciated! I am writing this out of desperation because I just found all of this today, sorry if there are lack of details.