I watched a few scenes from DAD CRUSH series and holy fuck they're pretty enticing. Not mind blowing but pretty fucking good. Now, full disclosure - I'm not much of a DS guy, I like MS and SS better and also I consciously didn't quite engage with the beginning of the scenes so I don't know if and when the "step" usages happen but otherwise in general they're good enough to keep your dick hard. I think it might be even better if the scenes aren't POV.

Check out the one with Laney Grey and Minxx Marley. When the guy just begins to finger Laney for the first time - holy fuck - I could actually feel the intensity of the situation.

Huhhh... I guess it all comes down to the actors and how seriously they take the plot and just commit to the situation and scene.