Elena, I'm pretty confused about Hekate's relation with Bastet. The Cat goddess did call her 'sister' in the Alchemyst, but what confuses me is that Elders honor blood relations I don't think Bastet would want to kill a biological sister. Also Endor was bent on avenging Hekate's death and I don't think she would care that much if they were only sisters through marriage, so I'm assuming that Hekate and The Witch are related by blood.
Lucothea, I think what Elena meant to say was, we're not quite sure if Romulus and Remus are The Witch of Endor's children with Mars. And I agree, they may be Mars' kids but are they the Witch's sons as well?