At this point, the only theory that could possibly have a positive outcome for anyone is that she disappeared herself and tried to frame DS and she is really in hiding somewhere waiting to see if DS actually gets arrested for this.
It's been nearly 3 weeks. If DS abducted her, she is likely dead. If an accomplice of DS abducted her, she is likely dead. If a stranger abducted her (which I can't see happening) she is certainly dead. But if she and others close to her were worried that DS was planning to move back to MI with his job and attempt to get custody of the kids, and if the people closest to her believed her allegations of sexual abuse, it may have been enough of a compelling arguement to (in their minds) justify a drastic attempt to alleviate DS from the picture so that at the very least, LM & TM or other family members of VS would get custody of the children and make sure they were safe. They may have even considered it an honorable or righteous thing to do. People's emotions run high when they feel children are potentially harmed or at risk of further harm. It's much more likely that someone would put themselves at risk to help somoene they believe is a battered, scared, abused wife and mother of a sexually abused child, than it is to believe that a friend or co-worker would go driving accross country for someone because he was mad that his wife took off.
If there was a mountain of evidence pointing to DS and his abusive past, this would be a no-brainer. If he had an arrest record, military infractions, documented drug or alcohol problems, medical documentation of mental disorders or depression, history of sexual assault, or anything like that. I would jump on the bandwagon...but this case is puzzling because there is nothing like that.
I hope she is alive. It would be the best possible outcome. Even if she was found to be the mastermind behind it. She would at least be alive and her kids would not have a murdered mom and a killer dad.