One woman kneeling before another who exposes her pussy to her - who are they?

I've seen this gif on bdsmlr and can't find any more details of it by image searching it. This looks like it's a scene from a longer film, and I'd love to know where it comes from, as well as who the two women in it are. A woman in a blue dress stands before a woman in a black one, then kneels. The woman in the black dress looks down to her, then lifts her skirt to reveal her naked pussy underneath.