She's going to head home. (a)

"Well this has been fun, James." Kayla stands up and stretches.
"You're leaving?" you stand as well, walking over to her. "It's early, yet."
"I'm not sure if it would be entirely appropriate..." she gives you a look, possibly mischievous? "To be here with you... without Jenna..."
"Ah..." you nod. "I guess you're right."
She laughs, and gives you a hug. "You've been so nice to me today, the least I can do is not get you in trouble." She gives you a quick peck on the cheek.
You watch her walk to her car. Is it... regret you feel? You aren't sure. But she's right. Play it safe.