New Teen Titans (Volume 2) #7 April, 1985.

Kory, Joe, and Lilith are enjoying themselves at an out-door art show, when the winged alien returns and carries his beloved Lilith into the sky. When Lilith once more begins to glow and to evince her heat powers, instead of battling the extraterrestrial again, the three Titans take him to Lilith's apartment in Greenwich Village to talk. At the same time, the beautiful but merciless owner of Sun Publishing Company reveals herself as Thia, goddess of the sun and the missing twelfth member of the mythological Titans. Even as she soars sunward to replenish her powers, she senses the nearness of Lilith, who is actually her long-lost daughter. Thia invades Lilith's apartment, announces that she is the precognitive Titan's mother, and abducts her, despite Starfire's efforts to prevent her. Starfire summons the other Titans, and Wonder Girl is able to identify Thia from Kory's description as the wife of Hyperion. Taking the winged man with them, the Titans journey to Paradise Island, from which they hope to enter the realm of the gods to which Thia has most probably taken Lilith. Arriving, they find the island in ruins and all of the Amazons gone.

New Teen Titans (Volume 2) #7 April, 1985.