Flawless my wife and she is under the assumption that when she transforms to pony/eqg that I think it's a totally different person. Obviously I know it's the same flawless, but she is autistic and thinks she is successfully tricking me.
We will have rough sex for hours, then she will leave the room, transform to the other form, walk in, and say "huh? What was all that noise? Were you wrestling with someone?" I always play along.