Hi All and thank you for your responses.
Sue left her husband because he opposed her baptism. He knew that her being baptized would mean a change to their family christmas arrangements and he didn't want that. He didn't want her to leave but she felt she had to to fulfill her baptism ambitions, hence the "spiritual danger" label. Sorry if I didn't make that clear. Keith was ok whilst the study remained just a study, but as soon as things became serious, he put his foot down.
According to Brenda who knows them both well, Keith has never been physically abusive, he abhors men like that who he calls cowards. He just wants to be a normal family. The uber-sister has been a major part of Sue's life for ages. She was there when the kids were ill or the family needed anything. Sue regards her as a really good friend but failed to see the agenda behind such attentiveness. Some of you seem to know the uber-witness personality well and you've nailed this sister exactly.
I remember how sad the uber-sister was one day when she said to me that she'd been pioneering for 15 years and hadn't brought one bible study to baptism. It seemed to be an ambition of hers, which I suppose is natural for a pioneer.
This sisters own marriage broke up 5 years ago when her husband had a complete nervous breakdown and she would tell me in all sincerety that she'd urged him to go to the elders for help. Of course the poor guy needed much more help than what the elders could offer but naturally the first port of call for this sister was the elders.
All-in-all I find the whole situation extremely sad. I know all of them quite well and am only out of the loop directly because of my status. Its just a strong impression I get that the urgency to get baptised must've been really pushed hard with Sue to make her do this.
But the end result is the breakup of a marriage, and whatever the reasons or excuses, its ultimately because of the teachings of the Society and their inflexibility.