Do they have to have much in common to have hit it off in a bar?
I'm not trying to come off as disrespectful to PH, but people do go out to bars and hook up with people they wouldn't necessarily have relationships with. We also still do not know who else is involved. PH mentioned other people. Maybe some of the other people were young and attractive?
As for speculation about her preferences, those are not always set in stone.
Obviously, FH is guilty of something awful. Probably a lot. He can be guilty of terrible crimes AND PH could have left unwillingly.
If PH and FH left together around 10:45, and PH sent the text saying she didn't know where she was, or who she was with at 12:15, that's still roughly an hour with FH, give it take. A little less if they're traveling the 15 miles to the first house. It shouldn't take that long just to get there, right?
What happened between 10:45-12:15?