The cousin of Chief Justice John Roberts, a lesbian seeking the ability to legally marry her partner, will attend the Supreme Court hearings this week that will determine the constitutionality of laws prohibiting gay marriage. Jean Podrasky and her partner will sit in an area reserved for personal guests of the justices. Though Roberts, who was appointed by George W. Bush, is known as a typically conservative justice, his cousin has told reporters she believes he will vote in favor of gay marriage …