SA, thank you. I know it wasn't directed at me cos he really had nothing to say to anyone and MIL and D both made comment about it. He continued to open the car door for me. We were all trying to engage him and he was responding briefly but not initiating further conversation. He appeared tired and maybe that was part of it.

D, being D has already made comment about his mood and he responded that he was fine. That's the response I would have expected.

Perhaps you are right and he was doing some processing as well.....it was probably quite a statement to his parents to have me there.

I'm trying hard not to read anything else into it!

SA, thanks for reminding me of the gracious response.