1) There's no sign of intimacy issues. Even though their kids already made that pretty clear, Donaldson unpacked the body language from this 2007 snap anyway. Their bodies fully facing each other, practically touching from head to toe means Kelly and Mark are "comfortable being vulnerable with each other." Even when they don't see eye to eye, nothing gets in between them (literally and figuratively). Patrick McMullan - Getty Images

2) They wouldn't dream of being with anyone else. Yes, this is a pose for the camera, and yes, they've been in the public eye for a long time and definitely have these moves down patbut Donaldson's still buying it. "There is power in a held gaze and a reciprocal gaze at that," she says. These looks are full of "sincere adoration, attention, and interest." Mark, in particular, has his head tilted downward slightlya sign of humility. He knows his wife is a badass, and after all these years, he's still in awe. Steve Granitz - Getty Images

3) They're a team. Why? Just peep that super-tight handhold , those matching smiles, and identical stances. These similarities and their interlaced fingers make clear this couple is a unified front with similar goals. Donaldson chalks up this strong bond to security: Kelly and Mark feel safe with each other, so no matter what life throws at them, they'll take it on together, good or bad. Gilbert Carrasquillo - Getty Images

4) They're proud of their marriage. As they should be, says Donaldson. Their marriage is strong and their love is genuine, according to this body language. The clues include Kelly's cupping Mark's face. Touching someone's face is "a highly intimate gesture" since it increases the love hormone, oxytocin, says Donaldson. Another major sign? Mark's hand resting on Kelly's back. He's not pulling her in closer, and she's not resisting. This means he doesn't try to control her or manage her in any wayhe accepts and appreciates all of Kelly, exactly as she is. Steve Granitz - Getty Images

5) Mark is Kelly's biggest fan. If you look closely, you'll see that Mark has a "tighter grip on Kellys hand than she has on his, which communicates reassurance and support," says Donaldson. The angle of his knee is another giveaway that tells her Mark's got Kelly on his mind. She's always a priority. These small moves together communicate: "Im here, and Ive got you." Kelly touching Mark with both hands and leaning on him is equally a big deal. "The more we touch someone, the more we demonstrate a deeper bond," says Donaldsonwhich means Kelly knows she can rely on Mark, always. Bravo - Getty Images

6) They're equals in their relationship. The way Mark and Kelly walk "indicates equality in this relationship," according to Donaldson. Since they're walking in unison, she knows their relationship is solid and they want the same things out of life and for their family. The kiss while they walk (in the middle of the street...with ease...with Mark's bum foot!) is the cherry on top that assures Donaldson that these two are in total harmony. Alo Ceballos - Getty Images