Months before Kristen Stewart was caught kissing her Snow White and the Huntsman director Rupert Sanders by photographers in L.A. on July 17, the actress posed alongside his wife, Liberty Ross, on the red carpet of the blockbuster's London premiere May 14.
In one pic taken at Empire Leicester Square, British model Ross, 33, who played the mother of a younger version of Stewart's Snow White in the film, appears to holds hands with Stewart, 22. Ross hugs Charlize Theron, who is standing between the two women, and smiles at the camera while also reaching over to Stewart. The Twilight actress, standing on the other side of Theron and next to her costar Lily Cole, stares back at Ross with a slight smile.
"This is the photo of the ultimate betrayal," body language expert Dr. Lillian Glass tells Us Weekly of the compelling snapshot. "[Kirsten has] got what's called an ambivalent smile. Her eyes aren't smiling, but she's got like a half smile of her mouth."
Late last Tuesday, Us revealed the exclusive photos of Stewart's shocking fling with Sanders, 41, from their steamy rendezvous on July 17. The next day, Stewart issued a statement apologizing to her real-life boyfriend and Twilight costar Robert Pattinson, 26, for the "momentary indiscretion" saying it "has jeopardized the most important thing in my life, the person I love and respect the most, Rob. I love him, I love him, I'm so sorry."
Although her photographed fling with Sanders didn't unfold until three months later, Glass speculates that Stewart has a look of guilt on her face in the May 14 shot.
"Liberty has gone and touched her and reached out. And she's looking like she's made a friend," the author of The Body Language Advantage explains to Us. "Liberty looks very happy, like she would not suspect anything. She's posing for the camera, she's reaching out to Kristen, touching her. She looks very relaxed and very much in control."
Stewart, meanwhile, is "not looking at anybody else," the expert says. "It's like she feels bad. That's probably why she has the ambivalent smile."
Sanders, 41, who shares two young kids, aged 7 and 5, with Ross issued a statement to Us on Wednesday, saying, "I am utterly distraught about the pain I have caused my family. My beautiful wife and heavenly children are all I have in this world. I love them with all my heart. I am praying that we can get through this together."
This article originally appeared on Usmagazine.com: Kristen Stewart, Liberty Ross Bond on Red Carpet: What Their Body Language Reveals