Hopefully this doesn't get me in too much trouble with BK, but because I basically said the same thing just the other day I just had to show what she reported today:
"13:18
Apart from the photos of June 4, 2008, there's no evidence they were having sex? Not true. There are the phone sex tape recording and texts."
So, other than the bedroom nudie pics that afaik do not show both TA and JA even in the same frame, a few texts and the one sex tape we've heard, there is no proof they ever did anything sexual beyond whatever their "fruitful imaginations" voiced. Yea... for someone who claims to carry her camera everywhere and documents everything, where's the beef JA?
I think they were intimate far less frequently than she's said (and said and said and said), but more than you seem to think. Travis told his friend Taylor that he knew his situation with JA was out of control and that he "hated himself" for getting intimate with her after she moved to Mesa, but that she made it very difficult for him to say no by doing things like surprising him by climbing into his bed naked while he slept and waking him up.