This is from theNu-west series (video and pics) titled "Mothers Who Spank Their Daughters" in the 80's. Ed Lee actually recruited (and paid) both girls and their mothers if they were willing to sign a release form and spank them while he filmed and took pictures.
It's amazing what some (most) people will do for money

Dayuum I’d love to see the continuation of this action

Nice little rear end on this gal.

"Holy shit! Where do these cum spots in your panties come from?!"

“You’ve been a very bad girl! Now lay down across my knee and I will spank you!!