The Mormon religion is like every other religion regarding premarital sex. It's not allowed. I'm Baptist and its against the rules. Always has been always will be. Now, the revoking Temple privilege is different though.
The reason she targeted Mormons IMO is their stressing early marriage and starting families ASAP..not the sexual fantasy stuff. She wanted marriage, pronto. She may have seen Travis's Achilles Heel was sex so she...being a proper borderline...used it against him. She tried very hard to convince him that no other Mormon girl would be able to fulfill his sexual desires so he might as well just marry her. IMO
There is a difference, though, in the Mormon's prohibition against premarital sex. No mainstream religion allows it, but the Mormon faith is so opposed as to consider it (ironically, in this case) a sin secondary only to murder.
I agree she pre-selected Mormons as a target group because marriage ASAP was her goal, and, as JM argued, because she considered them, as a group, to be successful financially. IMO she also saw Mormons, again as a group, to be easy prey because of beliefs specific to that religion, including the imperative for Mormons to believe in and nurture every soul's inherent divinity. (A rough parallel to this can be found in Judaism, specifically, the obligation to forgive --6 times--any offenses against one; the High Holy day of Yom Kippur is about tending to this duty if not yet discharged).
I didn't mean to say that the first targeted Mormons because she thought Mormons most vulnerable to her sexual manipulations. She selected Mormons as targets before she met Travis. She tried, in the beginning, to portray herself as a true convert to Mormonism in order to lure Travis (which, BTW, is the one of the reasons I never believed they engaged in any kind of sexual activity before early 2007, at the earliest). Thus her strutting back and forth in front of Travis, Book of Mormon in hand, while over at Sky's house.
It was only after she realized playing the good Mormon wasn't working that she turned towards sex.
If we don't agree, we don't agree, won't be the first time
, but IMO the was well aware of how conflicted and guilty Travis felt about being sexual with her. He was a devout Mormon, an Elder, and being right with the church MATTERED to him, no matter his lapses. She's a psychopath, not just a Borderline. She knew his weaknesses, and she used them against him to gain control over him. IMO she was absolutely aware that the more sexual he was with her, the LESS likely he was to consider her marriage material.
Again, sex as a weapon, to drive a wedge, if you will, between Travis and his Church, his faith being in her mind the chief impediment to his being willing to marry her.
Sex to make him feel unworthy and weak, sex to make it difficult or impossible for him to be right with the Church, the recording and manufacturing of evidence of sex to drive away any and all good Mormon marriage candidates.
And when he was stripped of the Church and all other marriage prospects, there she would be.