Definitely a bizarre family. Her current stepfather is also a Muslim convert, but he converted 40 years ago and has been in and out of jail since then on drug charges, so I suspect he may be a Black Muslim. Some of them become fanatics, but others don’t take it very seriously.
This stepfather and her mother have only been married for about a year, since the death of the woman’s husband who was, presumably, jihad jamie’s father. So it doesn’t sound like the stepfather is just playing innocent - he really wouldn’t have had much influence on her. But she was clearly a flake just looking for some lunacy to attach herself to and follow into oblivion.
Once upon a time women like this would have gone off and joined Jim Jones or one of those cults where you sit around waiting for the spaceship to pick you up, but now they join a cult that tells them to go out and kill non-members. That’s the “special difference” of Islam. It’s murderous.
Or, George could be her handler and she his surrogate. He’s obviously a loser. Then you have the mother, another loser and unstable herself. What a family!