Steps back.

After a few extra seconds of looking into your eyes, Kayla suddenly shakes her head and steps back, fumbling with the key in her hand and looking down.
"Um....yeah so..."
"Yeah...enjoy the c--"
"I should ge--"
"--ar."
"--t back to..."
You both stop and chuckle nervously. She lifts the keys and smiles.
"Thanks again, James."
Why are you both acting like a couple of teenagers? You shake your head as you walk away. She climbs into the Mustang, starts it up, and drives it to a parking spot next to her Sunfire. As she passes you, she yells from her rolled down window.
"THIS THING ROCKS! Thank you sooo much!"
You wave. Perhaps this would be a turning point in your embattled relationship with Kayla.
With all business now concluded at the shop, you climb back into the Javelin and head home, with more than enough time to tidy some things before Jenna gets back with the groceries.
When Jenna does get back, you all pitch in together and help to get everything squared away, and just as the last bits of food get settled, you hear the twin honks of horns as they pull in the driveway.