No Blaire is not in any kind of relationship, she seems single, though seems like she's experienced if you have an issue with that.
NTR? Only if you want to send her down that path, though that would actually seem like turning her away from who she is in her head... She's actually part of the story for me that makes me want to step back from the other relationships. but you can't.. (which is ok, the story is about someone who nature is not going to be one girl.)
I sort of feel that way about Kiara, but to be fair, she caught the MC trying to get in her head with out losing her shit over it so.. in some respects how she's behaved is right.. my issue is with how the mc is going to react to that... which is "not really: I'm guessing, I would like to "friend zone" that character a little more than the story will allow I suspect... she also does not appeal to me physically.. which impacts how I feel about her development