I will often go to the gym with my wife Emma who loves to flirt and tease the guys as she works out. There is a regular guy there (lets call him Jason) who is very fit, late 20's and confident bordering on arrogant. He looks very successful and has often talked and flirted with Emma. He is friendly enough with me but is always eying Emma up. Well one Saturday in October we had gone to circuit training (Jason also does this) and the car park was packed. I drove around for ages and finally someone came out to leave. I was just about to pull into the space when suddenly Jason arrived in the car park and drove straight into it! I wound down the window to protest but he just smiled and walked into the gym! I was not happy at all! Emma got out the car to go to the class while I waited ages for another space. When I finally got into the class late I was a little cross to see that Emma had paired with Jason on the circuit training stations. As I went round on my own during the class I could see Emma was turned on by how annoyed I was. This guy had stolen my space and my wife was training with him and flirting at the same time! After the class I showered while he looked at me with a smile that girls seem to love. It didn't help when I saw he had a bigger cock than me! As I left the gym with Emma I decided to tell him off for taking my space. I asked for an apology but he just laughed and told me not to worry about it! I tried to put him straight but he kept coming out with funny one liners that made Emma giggle. Suddenly Emma lent forward and gave him a kiss on the cheek before taking my hand and leading me back to the car. As we drove home I tried to tell her off but she just looked at me and giggled! She is SO cute when she does this! I felt so annoyed at being humiliated but also turned on at the though of Emma fucking him! Later after dinner I calmed down and we talked. She said how turned on she was by me getting put down and being made to look like a wimp as I tried to assert myself. She admitted she wanted to fuck him and described how it might feel and how he would be better than me! I have to admit I was still cross but also turned on by the idea when suddenly Emma looked at her I pad and told me she had a Facebook friend request from Jason. I was in 2 minds but she told me she had accepted and was going to send him a private message. I asked her what she was writing but she said it was none of my business! They then had a long conversation on messenger for ages! Later as we snuggled in bed Emma told me that she was fantasising about cucking me with Jason and that she had messaged our regular Bull Tom who though the whole thing was fantastic. Tom texted me to tease me and tell me Emma could soon have 2 Bulls! Of course Emma knew that this is such an early stage and we have to tread so very carefully and it may come to nothing. That said she is thinking of having a coffee with him. The final bombshell before we went to sleep (after I licked her to orgasm) was Emma telling me I was going to stay in chastity with no relief until she fucks Jason or decides to abandon the idea! She was loving the though of me being so desperate to cum that I would beg her to fuck him! I was not impressed as I was already denied for 10 days since a ruined orgasm and due to get some relief!!! Naughty Emma just laughed herself to sleep!