'We're going stop here for a few minutes and enjoy the view. Everyone take off your seat belts and relax.' - It is my feeling that this is why the stop. I'm sure many would want to get out of the car to relieve themselves, if nothing else, but then again, if the engine was still on, the doors would have been locked and no one could get out. I think Jen is the only one who knew what was coming - and it was planned from the get-go; hence why everyone was drugged with Benadryl - most likely unknowingly - deliberately put in everyone's water bottles - or a shared water jug. I also think this could have long been the 'ultimate escape plan' for Jen in her mind as their lives and their minds became unraveled. There are too many excuses made along her social posts of why the children could never live normal lives, or get jobs, etc. And, there would be no income for them after they reached 18. Perhaps Benadryl was being used inside that house for a long time to sedate the family. I think Jen decided a while ago that she'd run as long as should could, until she couldn't. I would think there was serious mental illness, personality disorders both women had - and were co-dependent. If they weren't getting medical treatment - then the symptoms and behaviors weren't managed. And personality disorders can't always be helped with medication anyhow. In the end, it was mass murder and suicide. I don't have a theory on the missing two. However, I do believe that some may have been dead/killed/deceased before the plunge, including Sarah. Whatever those last moments were, they were filled with terror, sedated or not.