Mistress Robin

You met Robin on Tinder. Robin is a very pretty girl, she's into athletics and martial arts. You can see from her Tinder profile that she is a very strong girl, probably stronger than you. You had a great chat on Tinder and agreed to meet up. Your first date is at a restaurant. At the restaurant, she said she had to go to the bathroom and would wait for you there. You followed her to the bathroom not knowing what was waiting for....