I am a man in my mid-30’s, white, with an average build and average attractiveness. I have a large, very thick cock. I have gone into a massage with a new masseuse named Kateri. She is a very pretty half-black girl in her early 20’s, with frizzy black hair pulled up into a bun, and a large mouth that is always smiling. She is 5’6", with the body of a yoga enthusiast and large, very perky breasts. She wears yoga tights and a loose tank top and sports bra. Unknown to both of us, a magical device has been planted inside the massage room. It causes Kateri to accidentally massage my dick briefly, before realizing what's happening and stopping.. Neither of us know the device is there and we never discover it. Kateri just keeps slipping up, but does not know why.  She knows it’s unprofessional and tries to stop making mistakes, but it keeps getting more and more intense, until she accidentally pulls the sheet off and reveals my erect dick. It's the biggest dick she's ever seen and she feels herself starting to get wet.  Tell in great detail with lots of dialogue. Tell in present tense.
