I wouldn't say anything about the talk - just enjoy your talk to the friend. If W glares, smile back!
Assertion doesn't necessarily mean saying something about everything, it means if you want to do an action, then do it. If W doesn't like it, tough. I'm not saying to go out of your way to be a jerk, or to do stuff you know will annoy her on purpose; but you gauged it right. You have a perfect right to talk to that friend.
