18M whipped my teacher 32F on the back then gave me head

I noticed her fb profile had a lot of backless dresses, she had a great looking back. Once I plucked the courage to ask her in private. Why do you always put on backless pics. And she said she liked to feel like being a shameless slave about to be whipped.

I asked her if she wanted to be whipped proper on her back. A bit of confidence between us needed to build up, but eventually we organized a session in the courtyard where she was shackled between two pillars, naked from the waist up and she urged to lash hard. Which i did. She liked it so much she wanted to bj. Which even though hesitant at first, said ok

She never posted a picture of her marked back but one day i came across her wearing her usual backless dress, and she had some marks showing. She never looked hotter