From Sara Gregory's website, taken from a Crimson Moon Party in 2011. If you check out her site you'll find a lot of spanking party pics.
This one is sort of blurry but most of that blur is from the rapid motion of the spanker's hand and that said I think the spankee's reaction is for real, also check out how the spanker is pulling her jean skirt tight for better contact.
The last two are marked bottoms post spanking.
