"She was having dizzy spells, she was needing to use a wheelchair and be helped to her car..."
This is an excellent point & one that deserves exploration. Her symptoms did not seem within normal bounds for a pregnancy. I would be surprised if someone like SP would try to poison his wife to death, however, I wouldn't be suprised if he was trying to cause a miscarriage.
Trying to cause a miscarriage... Omigosh! I hadn't thought of that!
WHAT a creepy thought! But then, Scott is definitely a creepy guy!
Regarding his possibly poisoning her with arsenic, I think I see another problem with that... see what you think: Seems to me that in most cases of people poisoning someone with arsenic, it is done over a period of time. That just doesn't jibe with the way I picture Scott. He's a guy, relatively young, obviously is not into delaying the attainment of whatever he wants to get. (As shown by his having the affairs and his spending habits.) So gradually poisoning Laci with arsenic over time... nah.
But the miscarriage thing, now that's an intriguing thought you had!