From this point forward consider *any* conversation your W has with your family/friends about the marriage a HUGE flaming match being tossed in a roaring fire. Don't do it. Just stop.
Of course she wasn't opposed to listening to your BIL for 45 min. because I do think she was there to network for business reasons as she was rather upfront about how much she admires his job and how she would like a job like that. So, if she has to listen to him babble for 45 min. about marriage to get to "her agenda" she will.
If somebody told me they would give me a pair of Prada boots if I just sat and listened to a 45 min. speech about pig poo I would happily listen and participate as well because I want those boots.
And saying "obviously" is mind reading. You don't know she wasn't opposed to it simply because she didn't verbalize it. You just know she tolerated it to make herself look good.
