What should i do or feel?

I've had a relationship with my high school sweet heart and we were together throughout high school then we started college long distance relationship soon after, then she left me and we kept in touch after that for 4 years and during that time we were friends with benefits at the end of that 4 year on and off again thing I was involve in a roll over accident shattered my c4 spinal vertebrate but never severed my spinal cord while i was in ICU i received a phone call and it was her after the "are you okay?" chit chat told me not to be mad or upset so then she had told me that she had had a baby boy and that the father was a foreign exchange student from Bolivia and that he had already left back home now all I want to do is to rub that all in her face and tell her that's what you get for doing that but can't bring myself to doing it i also get the feeling that she might want to get back together i believe that she realized how differently i had treated her compared to him and i think she hadn't noticed what she had until she lost me. what should i do? how should i act towards her? how should i feel towards her? what should i say to her? where would this lead to?