I also think there was some foreshadowing of a troubled marriage during Monday night's shows. Actually, I think the foreshadowing began toward the end of last season when Amy and Matt clearly were having arguments during the family cruise episodes. (The mini kind of cruise along some rivers in the southeastern part of the U.S. Sorry, I can't remember exactly where they were.)
I'm not stating that I think the marriage is doomed, by any means, but I think TLC will show us how hard it can be on a marriage when the children grow and move on and the couple is left with each other without many distractions.
I think this kind of problem is probably magnified when you see two people who really are opposites of one another in many ways....like Amy and Matt.