Seeing the car stop and pull over, he creases his brow. They were quitting the pursuit, but with good reason. He was curious about what that whole situation had been about, but this had potential to get out of control. He just wasn't that curious.
"Honey, stop. Pull over and follow that other car over there." he points at Cassie's car. "Just take it easy and stick to their speed. No need to be rushing about anymore."
Once the cars come to a stop, he descends and instructs her to go back to her friends and have fun.