Who do you mean with Goth, I think there is non in there?
First of, you should figure out how to get the whole family, because as long as you know how to do that, you just have to do the same, but fool around with everyone else as well, I got everyone except Megan.
You just need to go for love but respect them all. (You can get sub-Bella by disrespecting her, but I couldn't get her pregnant in one run, so I went for the respecting one in my last game)