So I see. I'm halfway through now, and Verity's 'if they aren't killers, let them be' attitude would aggravate Sam and Dean no end (though probably only one of them at a time) and also I checked the dates on the family tree at the start and Sam's got seven years on her and Dean eleven and she ain't nearly old enough yet for that to be a nonissue, but give it a few years and I suspect my initial assessment will again apply.