My thoughts on what happened based on what we know.
*She is at a crossroads in her life. She is having problems with her boyfriend and just lost her job.
*She had wanted to break into modeling. Personally, I thought the pics of her that were more natural were much prettier but I don't think the other pics were *advertiser censored*. Women seem to think they need all those enhancements to make themselves stand out, look at half the actresses in Hollywood. When Robyn was madeup in pics she was beautiful.
*GG knows all of this and finds the perfect opportunity to take advantage, she's in a vunerable state.
*She thinks she's going to Aruba primarily to model, a way to make some money, a way just to get away from it all, and maybe even see if there might be anything there with regards to GG in addition. Which is why she didn't tell RF.
* She may be willing to do some nude shots, again, hardly a scandal in this day and age.
*When he wants to turn it "beyond pornographic", she resists, eventually causing her death.
We don't know if she took any pills willingly, or if he had planned to stop for a drink so he could slip her a few, to make her less able to resist later on. I lean towards the latter.
JMHO