Triangles will be formed and chemistry will heat up this winter on Glee — and we’re not talking about story arcs involving geometry or science. (As if the students of William McKinley High School actually attend classes in the first place!) TVLine’s intrepid reporters caught up with the cast of Fox’s high-school musical at Sunday’s Television Critics Association bash to get the scoop on what’s in store for several of the show’s power couples:

Sebastian and Blaine | While Grant Gustin’s troublemaking Warbler appeared to have his eye on Kurt’s preppy boyfriend in the first half of Season 3, the colder weather will put a chill on their sexually charged interplay. “It’s actually going less in a flirtatious direction [between Blaine and Sebastian], and more of [Sebastian] just being a d***,” says Gustin. “I’m not necessarily trying to split up [Kurt and Blaine].” In other words, don’t be in a rush to put a for-sale sign on Klaine’s chic holiday chalet.

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Artie and a Mystery Lady | “Artie gets some lovin’ in the first episode back,” says Kevin McHale. “He goes after one lady — a current cast member, she’s not a series regular. That narrows it way down. Way down.” While McHale neither confirms nor denies his character will hook up with tone-deaf but increasingly amusing Sugar Motta (Vanessa Lengies), he did admit that Artie’s romantic stock is on the rise in general in 2012, thanks in part to the attention of Cheerios co-captain Becky. “She wants her some Artie,” teases McHale.

Will and Emma | News of Will proposing to Emma in next Tuesday’s episode has been widely reported, but what prompts him to get down on bended knee? “I’m trying to not give away things, but Emma basically lets Will know that she’s ready to move forward,” says Jayma Mays. That said, don’t bet your entire bank account that Miss Pillsbury will be interviewing wedding planners before the school year is out. “There could be many reasons” that Emma might turn down Will, says Mays, adding that the title of the episode, “Yes/No,” is an apt one. “We wanted it to be a bit ambiguous because they do touch on some issues they have been pondering for each other. They’re being very mature.”

Sam and Mercedes | “Right now there’s a love triangle going on,” says Chord Overstreet of his character returning to McKinley to find Mercedes paired with towering football star Shane. “I don’t know where it’s going, but I’m having fun.”

Mike and Tina | “Mike and Tina did have a little fight [during the fall],” says Harry Shum, Jr., acknowledging Mike’s fury at Tina confronting his father, “but now it’s good.” Looks like in this case, the end — Mr. Chang getting on board with Mike’s dancing dreams — justified the means.

Kurt and Blaine | Look for Kurt to sing “Ben” to Blaine in Glee‘s upcoming Michael Jackson tribute episode. “I have no idea [why it was chosen], but I know it was voted the worst song in history by some group,” says Chris Colfer. “[The song] was about a rat, but we’re singing it about Kurt’s boyfriend. I’m not sure what the connection is!” Alas, though, the chorus doesn’t find a lyric change from “Ben” to “Blaine.” “That would have been clever, though,” reasons Colfer.

Kurt and Karofsky | Colfer says he’s betting that Max Adler’s homophobic-bully-turned-gay-bar-enthusiast will return before the season is over. “I love that character,” Colfer says. “I love that he’s kind of like a good guy now.”

Brittany and Santana | While some fans have expressed dismay that Brittany and Santana have yet to seal their romance with a kiss, costar Jane Lynch says she thinks the lack of girl-girl action makes sense. “I don’t think Brittany’s in it. I don’t think Brittany’s in love with Santana,” Lynch theorizes. “I think Santana needs a girlfriend. Brittany loves her, but Brittany’s not her girlfriend.”

Sue and…Somebody? | “There’s something big coming for Sue that I can’t tease, but let’s just say for a peri-menopausal woman, it’s pretty exciting,” says Lynch. (Reporting by Matt Webb Mitovich, Michael Ausiello and Vlada Gelman)