WH ... such a nightmare, eh?
If I recall back in the day (lol at all those years), I think young people meet, date each other, see how things develop, all the while probably looking for a mate. (Wired into us). But all ok, and very decent if one or both finds out "This is not really for me." I think that happened here, and a LOT faster because of Travis' friends always on Travis about her. Maybe not many young Morman's meet experienced HO's. She surely turned his head. RIGHT, "I never used KY before either.." she said to him. Oh please! AND only once or twice with previous men. RIGHT.
I saw a video where Travis was telling of a near death situation - a robbery - and she "was his girl". Head on his lap, his arm around her. A couple for sure. I think another one of their lies to paint him a real user and we are all better off now that he is dead. I think it just evolved as young people's relationships do. I remember I dated a lot, part of the learning process maybe.
Travis tried to move on as young people do (if involved with NORMAL people) Jodi wouldn't LET him. She "broke him in", then prevented him from moving on to another relationship where he might have had some intimacy. DESTROYED each and every one, almost forcing him back to her? Spoiled him? BUT HE DID TRY to get rid of her. Imagine crawling (breaking and entering) thru his doggie door into his home, at will?
Yes, she loved that sex I believe too. AND - HE was healthy!! AND I believe she loved the KILL too. I think she would do it over if she could. Pleased as punch with herself. After all that intimacy ... he decided she wasn't the one? LOOK OUT!!!!! (How many guys did we go thru before we decided to marry?) All thru our teen years... I did. Just "Getting To Know You"

A Madame once on the Jane VM show I think it was said "If it wasn't so much anal, I don't think this would have happened. Not sure why she said that... felt it was more of a "gift" to a man? You give ALL, then not enough? Maybe that was it?
Hopefully Travis' roommates were in and out during those 5 days, and saw to it that poor dear old, deaf, blind, Napoleon had water and some food. FIVE DAYS. We will never know. Imagine ALL of that stress that poor little guy was under, that, plus losing his beloved Master Travis.