I'm a girl, and sativas give me anxiety, at least in general. Indicas and hybrids relax me. Girls and getting anxiety from weed sometimes go together. I actually second the concentrates plan. I don't know a single girl who tried goo and didn't like it. I LOVE it. And you could even try making it from your sativa trim.
As far as strains, I personally like it skunkier. A lot of girls like sweeter strains though. I know a lot of women who like LA Con, but Blackberry Kush or Sage n Sweet are good ones too.
Are you in a state where you could go to a dispenary and try some? Having her sample a few would give you a much better road map. But oil is my first vote.