On Tuesday, Stewart embraced Paris Fashion Week by posing Chanel show in teeny shorts, a short-sleeved blazer and black gloves. She even smiled for the press (be sure to click on to see her actual teeth), despite the Mail's assertion that she's "livid" about Pattinson spending time with Keough.
"Riley was always Kristen's friend dating back from their time filming 'The Runaways,'" explains a spy. "Kristen feels that she acted as mentor to Riley … [and] introduced her to Rob and encouraged her to make a career of acting. Rob has been made aware through friends that she is devastated. Kristen is emotionally volatile at best of times, and flew off the handle when she found out about Rob's liaison with Riley. She's told Rob via friends she feels violated."
That bit about feeling "violated" seems dubious, given the groveling apology Stewart issued last summer when she was caught in a Mini Cooper-set clinch with her "Snow White and the Huntsman" director, Rupert Sanders.
Adding to questionable hookup rumblings: Keough's rep insists she's not Pattinson's new honey and wasn't the one snapped with him.
"Riley isn't dating Rob," her spokesman tells Just Jared. "And I can confirm that Riley was not photographed at all this weekend."
This time last year, Keough was rumored to be engaged to her "Magic Mike" co-star, Alex Pettyfer. She previously dated follicular-challenged crooner Ryan Cabrera.
Keep clicking for plenty more pics of K.Stew in Paris, including a shot of her new tattoo and her interaction with fans ...