I feel uncle's dick twitch every time my knickers come down
On vacation with her uncle and aunt, she was insolent and her uncle decided to punish her by giving her a good spanking. Leaning over her uncle's lap, she felt something against her stomach trembling and growing hard as he slid down her panties to spank her bare bottom. The uncle had a nice erection as he discovered his niece's pretty little white buttocks for the first time.