Apologize bottomless

"Vanessa, stop!" Lauren whined.

She was now beyond mortified, she was bottomless in front a stranger getting spanked! She'd just wanted to have some fun, not have her fat ass beat raw in front of a stranger! She could feel her cheeks jiggle and shake with every SMACK!

Finally, after ten spanks that felt to Lauren they lasted an hour, Vanessa stopped. Lauren instantly went to pick up her panties, but Vanessa pushed them to the floor and pinned both panties and skirt to the ground with a foot.

"Apologize to the nice driver!" Vanessa demanded.

Lauren, totally cowed by her younger sister, swung around cupping her crotch with both hands. She was holding her naked pussy in front of a stranger, everything else from the waist down exposed!

"S... sorry..." Lauren stammered.

Her lip quivered as she adverted her gaze, unable to look him in the eye.

"Uh... sure..." The driver said, hurrying towards the door, totally shocked and confused by the afternoon's events...