sunility

I'm looking for someone with whom to play out this fantasy:
 
I'm an adult living at home w/ my stepmother, who I playfully call my
"evil stepmother".
 
One day, she gives me a playful smack on the behind (I'm wearing
shorts) and I feign horror ("I can't believe you did that"). She says
that, as my "mom", she can do that anytime she wants (and does it
again just to prove her point).
 
Later, she starts smacking me more often, sometimes 2-3 smacks at a
time (always playful and light and funny, more of a symbolic
spanking). The spankings get more embarrassing (though not harder) as
time passes. For example, when I come out of the shower in a towel,
she insists I get smacked (over the towel) before I get dressed. I'm
embarrassed and protest, but am secretly fascinated.
 
As time passes, she does more things to embarrass me, like "frisking"
me for something I allegedly stole, but it's really just an excuse to
tickle me, for example. Another might be an "underwear check", where I
might even flee, so she ends up pantsing me as I run away.
 
The whole thing is played for embarrassment, not sex. She keeps saying
things like "isn't that cute!" or "look how red you're turning!" or
"next time, it could be even worse".
 
At times, she may even film my ordeal, since knowing I'm on camera
makes it worse. At times, I ask her how far she'd go, and she
demonstrates on camera with me as a willing-but-unwilling victim.
 
I've never found anyone who comes close to this, but thought this
might be a good place to look. I'd also be interested in playing this
online.