Thanks AS, just the type of answer I was looking for. It happened again this morning so I feel pretty good that how I handled my evening yesterday ("as if"/no expectations) coupled with what you've said is the way to go.
Me: 31, W: 29 T: 4 M: 2 Kids: 3 (SS: 7, SD: 4, D: 3) Separated, still living together: Nov 2013 Separate bedrooms: Feb 2014 W working away; kids with me: Nov 2014