Lara returned the kiss because it was hard to resist that, but when they broke apart, she said, "I don't know what you're talking about." Being bothered by that stuff didn't make her jealous. Even though it was kind of the definition of jealousy, but whatever.
"So are you going to answer my question?" Lis asked from the stall. "Or are you too busy making out again?"
"Steve," Lara called back. "I'm going with Steve. Unless he manages to find a girlfriend or whatever before the RSVP date."