had to agree to letting a man use me in front of wife

i got through life without that happening, but if the man was insistent i suppose it could happen

Your voice says no.
Your pants around your ankles say yes.
The very moment you feel that cock head against your ass, you know you’re bracing yourself for the inevitable.
Even as you’re verbally saying no, you’re pushing yourself onto his shaft. A sigh of relief overtaking you the moment the cock has breached that ass. In that instant you find yourself relaxing and accepting what is happening knowing you will soon be cum filled just like your mrs.
 
On several occasions, I had no choice but to let it happen. My wife loved watching it.

But what she liked more was putting herself a cock in my mouth.
Once, after she had done at "our" club it in front of an audience, she kissed me and said that she had enjoyed it.
Then she asked me if I loved her doing it in front of people.
'You know,' I said, 'I promised to do anything you want me to. As long as it pleases you."