Hecuba Goth and her twin brother Menelaus appeared in The Sims: Unleashed as Cornelia and Gunther Goth's pet cats. They are able to breed by mixing in with strays. The twin cats are in fact Siamese, and they are very social. It is likely that she is deceased leading up to the storyline of The Sims 2, which is probably the reason why she didn't make an appearance. During the storyline of The Sims 3, it is likely she was not born yet, which might also be the reason why she didn't appear.