Because, as we discovered, Kallie enjoys it on her thighs.
So if Kallie paid any attention at all to that comment of Shelley's, she knows that Shelley knows that she and MC are together. So does she really miss the subtext of Shelley's comments to Laura after she comes out of the bathroom? We're generally assuming (myself included) that Kallie doesn't know Laura and MC are fucking,* but after those remarks by Shelley, it seems it would be hard to miss.
She knows Shelley at least wants to fuck him
Really? I remember Shelley telling Kallie that, were she in Kallie's shoes (i.e., MC having rescued her as he did), she'd want to fuck him. I don't remember her telling Kallie outright that she wants to fuck MC.
"Andrew messed me up so bad I dunno what I want so I'm willing to explore this with you two."
But Kallie seems to know pretty well what she wants, and it's MC. She just barely stops herself from saying she loves him, but she does it in a way that makes it completely obvious that's what she's feeling. She hasn't shown any romantic/sexual interest in Laura or Shelley. She may well get there (or just open to a threesome for other reasons), but I haven't seen it from her yet.
I do agree that Kallie's likely to feel that Laura betrayed her, when she inevitably finds out that Laura and MC are fucking. With what we as the players know, I think Shelley deserves at least nearly as much blame as does Laura, but I don't know that Kallie will see it that way. But Kallie would have (at least) two good reasons to be pissed at Shelley: (1) Shelley's
fucking making love to MC, knowing (maybe better than Laura)** how Kallie feels about him (and knowing that she and MC are also having sex); and (2) Shelley knows Laura and MC are fucking (if Kallie hasn't already figured out Shelley's remarks, I bet she does in retrospect), and hasn't told her.
Shelley is the most Sydney-like of everyone.
Yeah, but Sydney was actually useful.
Really? I'll grant my opinion of her improved quite a bit once she actually joined the group, but I'm having trouble seeing her in the top half. But then, I'm Team Carol for N&T.
* Laura wants to be more than fuck buddies (as is entirely to be expected in an ILS game; FWB never works), but either doesn't realize it yet, or can't admit it yet. But she's jealous that MC's with Kallie too (and who knows what she'll do when she finds out about Shelley). Yes, she's concerned--maybe even mostly concerned--about MC taking advantage of Kallie, but she's also upset about him being with anyone else. Considering the situation, she thinks about her trust issues, which wouldn't be relevant if she were just blowing off some steam with MC. She's mollified when she realizes that things started with Kallie after she'd been pushing him away--again, only relevant if she's more into him than she realizes or admits. These things only matter if she'd expected him to be exclusive with her.
** Kallie hasn't talked with Shelley about this, but Shelley's intuition in this regard is very good; we haven't seen that one way or the other with Laura. So Laura knows that Kallie likes MC, and that she says she can't say anything more definite in their chaotic circumstances--whether she sees beyond that, we don't know. Shelley knows Kallie's in love with MC. And that isn't the only instance; Shelley's the only one who's figured out MC's having sex with anyone else, and not only that, when he is. And while I normally wouldn't consider that as indicating any real insight or intuition under their circumstances (there isn't a whole lot of privacy anywhere they've been), it's more than either of the others has done.