Before bull left on Saturday, Mistress pulled out a chastity cage and fastened it to cuck's cock, locking it as he lay on the bed in the bulls aftermath. She left him there until it dried on his skin, then unlocked his restraints. She ordered him to dress and run some errands scented with the aroma of her lover.
Sunday was uneventful. Cuck prepared all of the meals and took care to feed her only enough to help insure a chance to pleasure her the following week.
Monday morning the 5:30 alarm was especially brutal. Mistress punched cuck in the side to get him moving and got out of bed. She slipped into a pair of leggings, sports bra and t-shirt to prepare for her first proper workout in a while. She instructed cuck to prepare breakfast to be ready by 7:00 and headed for the door. She slipped on a pair of trainers and grabbed her puffy coat. Bull was waiting in the warm car per her instruction and they made their way to the gym. On the way she began to think about cuck's envelopes and the things she would make him do over the next six weeks.
Her marriage to cuck had been a good one and there had always been a free and open nature about it, but since his desire to be her submissive, it had become so much more special. She was able to learn more and more about his desires and needs through Domination than they ever had in casual conversation. He wanted to share her with others and this had been the springboard through which he met and found bull for her. Bull was about 7 years younger than her and 9 years younger than cuck.
Cuck enjoyed the thought of being pushed to his very limit for Mistress' pleasure. In the beginning she was timid about that need, but over the 4 months that she had come to know bull, she realized that the more she relaxed and enjoyed his company, the more cuck seemed to enjoy her and the harder he worked to please her. This fitness challenge would be her chance to really push his boundaries, and hers as well.
First envelope:
"If Mistress loses weight and the key opens cuck's chastity cage, then cuck may have Mistress for 45 minutes, uninterrupted, in any way he would like to enjoy her. She will bend to whatever desire he needs in order to cum and she will do with it, whatever he wishes."
"If Mistress gains weight or does not lose and the key opens cuck's chastity cage, then cuck may choose one of the following: