That makes homosexual marriage legal in all fifty states, because parents are either married or not, it can't depend on which state they are in.
It wouldn’t make it legal.Current laws outside of DOMA are by state by state and is up to inter state recognition(ie one state could theoretically not recognize your marriage). We leave it up to individual states to determine who can get married based on age, relationship..whether or not you have an STD..nature of the marriage(is it sanctioned, common law, etc)..so by repealing DOMA you are simply saying that the federal government accepts a marriage as defined by that indivdual state.