sounds like youve ade the sensible choice for both of you x
Happy you come to a decision, in my opinion, you've made the right choice. Best of luck for the future :)
Thank you all so much for ur replies 
I think you have made the best choice for you both. some fantasy's should stay in the head. Unless it was something that you both wanted, I would say the road to disaster could have been ahead.
I agree I think you've did the right thing.
I think if you would of did it, it would of all went wrong!
Best of luck for your future! :)
My hubby is a cuck too. I'm thinking about doing what he wants. Tbh the thought of him watching me with another man or woman really turns me on.
Another thing to try (if your oh likes it) is watching porn whilst he's doing u, and telling him that the girl in the film is so lucky, she looks like she's having so much fun, his cock is so much bigger bla bla bla lol x