So I agree that buddies should descend together, and the divers are ultimately responsible for making sure they do. And of course there are some lingering questions about the accuracy of the reporting. But let's say the DM did, in fact, tell the wife to go down with the first group while the husband and another diver who had trouble descending before went with another DM, with the plan that the buddies would reunite on the bottom. Can we agree that's not OK? Can we agree that, while the buddy couple should have said no and insisted on sticking together, that they shouldn't have been put in that position in the first place? Can we agree, even if we don't want to go so far as to hold the dive op liable in a civil suit, that if we found out this was standard practice for them, we'd steer our loved ones elsewhere out of concern that our loved ones might go along with that instruction to split up, as these two did, even though they ought to know better? This isn't about blame; it's about prevention.