I've been a witness to many of those 'situations'. I don't know if my experience is the norm, but it has always been j-dub sisters™ that go through a wild phase in their life and then retreat back to the dubs with a boyfriend or husband in tow. I can think of four sisters™ in the congregation I was raised in, that did this exact thing. And unfortunately the guys they brought with them, became passive and sometimes very active j-dubs.
At least lookingover has the personal integrity to leave her bf behind and then come back to her religion, but in most cases they end up dragging a victim back into the cult with them.