Very nice - I love it when a woman gets in on the act - I always imagine that they're enjoying punishing her more than the man does!
Reminds me of a similar thing I saw a long while back 'Mallory Stripped & Whipped'
Mallory starts off with her top and skirt in place but it's not long before her skirt's off, her panties are lowered and her bare flesh is getting lashed. She starts off defiant but by the end she's sobbing as her skin gets red and sore.
There's a nice bit in the middle when he lets a blonde girl have a go at her - she really looks like she's enjoying herself and Mallory gasps 'bitch' at her as she lashes her bottom