She's shit starter. But... Nat and Ethan can play her games or not, it's up to them (depending on path).
There is a subtle undertone with both Darrel and Jenna, both of them gave props to Ethan after sex, if I remember right Jenna was kind of impressed and when after the bukkake date Darrel, it ended with the same vibe (again depending on the path). Ethan has to conquer and make Jenna his bitch. Him getting fit at the gym, is a good start, then when Jenna comes by again he surprises her by overpowering her before assfu*king her before he brutally facef*cks and finishes with a big blast on her mug! Then he takes a picture of his handiwork.