Woman with dual reproductive systems both 'father' & 'mother' to 2 sons in China

A 59-year-old woman named Liu is 'mother' and 'father' to two sons in China. Liu married Tang and birthed a boy but got divorced after biological changes turned her into a biological male. Years later, Liu 'fathered' a son with another woman but couldn't marry her as Liu is still a 'woman' on government records and China prohibits homosexual marriage.