Cousins in the car

As Debbie got into the driver's seat the two other doors to the car opened. Lauren gasped as Debbie's daughter and son Tiffany and Greg entered. The pair were twins who were two years younger than Lauren, 18. They'd never gotten along. Lauren used to babysit them when they were younger. They were little devils, and Lauren had disciplined them harshly. None of them had ever forgotten it, and now they were seeing her in the car seat wearing nothing but a diaper!

"Who's the kid?" Greg asked Debbie.

"Don't you recognize your cousin?" Debbie asked.

"Our cousin? Wait, you don't mean..." Tiffany looked close at Lauren's pink face.

"...LAUREN?! This is Lauren?!"

"Well, you two missed some exiting stuff at the reunion." Debbie explained as she started the car. "Maybe next time you should think about that before you go to the arcade instead!"