Fanon talk:Raven Goth/@comment-25638061-20150914133256/@comment-5385060-20151223021909

A lot late to the party, but I thought I would say; Actually, it is possible to get an older sister of Mortimer through normal game play. Turn aging off. have Cornelia and Gunther have a child. (Use the watermelon trick to influence a girl.) Once the baby is born, get her in a good mood. Use a birthday cake to age her up. Then as a toddler, teach her walking, talking and potty. Another birthday cake. As a child, send her to school, get good grades, then age up to teen.

If you want to go all the way, in having her there from day one, go into edit mode, and save the Goth household into the library of saved sims. Either as just the family, or the house too. (House too is better, because it semi-saves the family tree, if the graves are placed on the lot.) Start a new file, move the actual Goth family away. Clear everything on the lot, then place the Goth family from your library. There you have it. Goth family with Mortimer getting an older sister. All features from the game without using a single cheat.

Naturally of course, if you wanted to change her tastes, you would need the lifetime wish reward "Change of Taste" to do that.