Barnacle Bay is not after The Sims 2 It's simple, is that I think that the creators did not intend to take Dina and Nina back to The Sims 3 Because they are quite young, and those in The Sims 3 are old people. When mortimer and bella were kids were not even born sisters, but the ancestors could have been. But many are fond of the sisters so they made them in Barnacle Bay, and they did not do well because the personality and appearance is bad made. Don is included, because the trailer to Riverview we see him teleport there. So Dina and Nina Caliente came back, because it was just only to play them, nothing to the story.