Writers really have had a thing for Hippolyta romancing the Gods and it always seems weird.
Justice League - Hippolyta/Hades
In JL animated series, Hippolyta and Hades are shown to have a past romance, one that, according to Hades lead to Dianas creation. He alludes to him helping Hippolyta mold Diana from clay and her getting her jet black hair from him. Of course this ends up in Hades betraying Hippolyta and being locked away.
Wonder Woman 2009 dtv - Hippolyta/Ares
The WW 2009 dtv starts off with Hippolyta battling Ares, God of War. Ares alludes to the two having a past romance that of course ended up betrayal and forcing himself upon Hippolyta leading to the birth of their son Thrax whom Hippolyta beheads.
Wonder Woman New 52/WW movie - Hippolyta/Zeus
The New 52 made the most drastic change to the Wonder Woman mythos, Hippolyta/Zeus have an affair that leads to the birth of Diana. Zeus doesn’t appear to betray Hippolyta like her relationships with past gods but he “dies” and Hera takes revenge on the Queen of the Amazons for sleeping with her husband.