We were lying in bed one sunday morning and I was playing with myself. My wife looked up from her book and said quite casually «would you do that in public?»

I hesitated and she insisted, «Don't lie. Say honestly?»

I admitted the idea was a turn on but said I didn't know if I dared.

She shrugged. «Why not? Everyone knows you're a wanker.»

I told her knowing and seeing weren't the same thing.

On our next vacation, we were at a beach where lots of the girls – but not my wife – were topless. The nearest couples were 10 or 15 yards away from us. My wife rolled towards me and said without warning, «take your briefs off.»

I stared at her in surprise.

«Do it,» she said and when I still didn't react, she added, «don't think about it, just do it.»

Maybe it was the sharpness of her tone but I obeyed. I slid them down and kicked them off. She giggled. I looked around nervously but no one was paying attention to us. I wanted to turn over on my belly but she wouldn't let me. She took my right hand and put it on my cock.

«Play,» she commanded.

«I could get arrested,» I whined but again I obeyed.

I masturbated, not daring to see whether anyone was looking and got off quickly.

«Bitch,» I whispered as I grabbed from my briefs.

She laughed at me. Later, back in our room, she made me admit that in the end, I hadn't minded.

«Next, I want to see you do it with another guy,» she said.