Argentina is about to have its first gay divorce, not quite a year after a groundbreaking law legalized homosexual marriage.

The Argentine Federation of Lesbians, Gays, Bisexuals and Transsexuals says the divorce involves a female couple who have only been married since April 20.

Federation president Esteban Paulon says theirs is the first divorce since July 2010, when Argentina became the first Latin American nation to authorize gay marriage everywhere in the country.

Paulon says the breakup is due to an alleged infidelity. He identified the women as 46-year-old Angela and 25-year-old Vanesa, who tied the knot in Rioja province, 725 miles (1,170 kilometers) northwest of the Argentine capital, Buenos Aires.