Wife demanding payment for sex!

My wife blocked me from her sex-life over 5 years ago and goes out all dressed up with a guy she works with at least twice per week.

I recently asked her if she was ever going to allow me to be intimate with her again and she came back a couple of days later saying maybe & that her lover is ok with it but only on condition that i pay for it!

She's already told many of her friend's about this and they were all laughing like mad, my face was burning red!

I do actually find it pretty hot even if the level of humiliation is overwhelming and seems to be getting worse as time goes on. I am worrying about how far this might go?

To top it off she has arranged to take him to a black tie/gala dinner and is lending him my dinner suit/tuxedo!

Is this normal once a wife has reclaimed her sexual freedom?