Sunny,
In between sessions I do think about what transpired. I also journal and reflect, etc. I don't think of it as working. I think of it as internalizing. When it's time for my next session I don't go in with an agenda...although i used to think I should. I try to relax and see what my unconscious tells me is where I need to go. I think that when I try to direct things too deliberately then I am masking something that needs to happen.
However, it seems that in your particular situation, couples work is very different than individual work and the goals and direction are more important--particularly there is a more immediate time frame attached to the outcome. So, if you could frame your agenda for your couples session maybe it would feel a little better.
I wonder if you might find this week that the individual session afterward is a good way to "debrief, and unload" and that by having this opportunity you may not feel this burdened before next week's couples session. Just a thought.....
I know this is a difficult time. Take gentle care and be good to yourself.