Thanks for the correction about the tweet.
Yolanda is a very cold woman in general, even her reactions with her "king." I don't think we will ever know the real her, or that most of the people in her life do. I feel like her time on the show is winding down. There's a great deal of face-saving going on with her, all very calculated, and it comes to a point where there is no face left. I can see why she distanced herself from Brandi - who wouldn't? - but all the talk about earning a friendship, it was not necessary, and I think it's backfired on her now because this ideal friendship circle she had sort of fell apart.
Lisa is the only one who knows how to walk this tightrope. She's lucky that Brandi imploded, but even then, she's a masterclass in how to get out of these situations intact.