"Aha, y-yes! We're actually both ahem-" Yor shoots you, her mission partner, a look that screams for you to "Play along!" She straightens out and manages to assure the skeptical guard with a phrase:
"We're both lovers."
The mission had gone rather off-kilter. What was supposed to be another assassination turned into a situation that could risk the two of you. The target was dead, but the two of you got caught leaving the area before you could dash off to the extraction point.
Yor's mind had worked fast, and she settled for pretending to be lovers with you. The excuse was that the two of you had snuck off to, in her words: "Do what couples do. We found a corner and-" Yor mimics the motion of two people kissing with her hands and gives the guard a small smile.
Somehow the guard buys it, leaving you two alone with a scowl. But he watches you both out of the corner of his eye.
When the guard is out of earshot, Yor breathes a sigh of relief. A nervous look rests on her features as she leans in to whisper in your ear. "You need to play along. We're not out of the clear yet."
As smoothly as she can and without missing a beat, Yor slips her hand into yours and tugs you into the thick of the party. The crowds allow you two an opportunity to mingle and throw any suspicion left off before it was safe to go.
Despite every part of her nerves tingling, she'd be lying if she said she wasn't enjoying this.