EPF -- the Constitution of the State of Kentucky forbids gay marriage and she swore to uphold it. The SC says that the DOMA was a state issue one year, then decides to say gay marriage is a Constitutional right the next.
Ex Post Facto means after the fact. After she was elected, the SC decided to nullify the state Constitution -- oops, no they didn't. This was a state issue, not a federal issue. It would've been a federal issue had someone sued the state of Kentucky to have the section of the state constitution struck that forbid gay marriage. THAT'S the course of action this should've taken but political correctness took over.