Mistress sarah is having some strap-on fun with her slut in lingerie.
this is a video from an actual session with my slut. It is not rehearsed.

my slut is on his knees while I get ready. I arrive with the riding crop in my hand. I make him turn around and then I use the crop and slaps his ass. Later I make him suck my dildo while still using the crop on his ass. Finally I bring him to the spanking bench where he stretches himself on it and I slap his ass again. But I prefer that he kneels in front of it so I can eventually use the strap-on.