Sounds like a very good & enjoyable evening. Glad it went well.
I wonder of your S & his girlfriend set you two up ? Wouldn't be the first time that has been done.
BTW, if he does something like take care of a social/family planning issue like he did taking the initiative on the dinner, thank him. There is nothing wrong w/ that from a DB polite friendliness side, and positive reinforcement to plant the seed that he can please you by being thoughtful on something most men leave to their wives should be encouraged.
Very nicely done all around.
Me: 50 W:43 S6, S3 M: 12 yrs. T: 17 M is bad & Not happy Bomb Mar '14 S 5 Feb '15 D Bomb 13 Apr '15 (but "no hurry") DB Coach May '15 Wants proceed on D Aug '15 Starting 1-on-1 negotiations Sept '15