He hears a "ping" from his phone and looks down to see the text from his girlfriend, "Did you change the sheets as I asked?"
His only response, "Yes, Ma'am."
"Good. We should be done by 4:30, but wait for my text."
"Yes, Ma'am."
He loses focus on everything except for her and her lover. He feels his cage tighten as his cock tries to grow.
This is a new experience for him. Amanda has met a new man and his apartment is much more convenient for her to entertain her new lover. He offered it passing, kidding, however, she perked up and loved the idea and felt it would be much more convenient for her pleasure.
She has yet to allow him sex of any kind with her, he has not even seen her naked yet, and the only romantic contact was holding her hand and kissing. She did like him and wanted a lasting relationship with her, so she was denying him sex in order to build a substantive relationship, but also felt that she should not be deprived of sex, to which he understood and agreed, after all, this was his role - her emotional fulfillment.
She mentioned that she wanted to see her new friend with benefits more often, but due to the distance between them, it was difficult, so he mentioned why not use his apartment, in passing and somewhat kidding, but she perked up at that idea and thought it was a great idea and thanked him. He was a little shocked and no less humiliated at the thought of his girlfriend having sex in his bed with another man, before even having seen her naked. What has he gotten himself into?
She was excited to fuck another man in his bed.
He wanted to text something to her, but did not know what to text, as anything would be obvious - she was going to use his bed to fuck another man and he could not do anything about it as he relinquished control to her long ago. So, he just tried to concentrate on work until it was time to go home - in another four hours, which he knew her new lover was able to fuck her for hours on end, and cum multiple times. He wanted to be there, but was unable to leave work, not that he had that option as she did not want him there anyway.
Thirty minutes later, he receives another text from his keyholder, this time, it was only a picture of his neatly made bed, with her pink thong panties lying on top of the comforter. His first thought was "she is really going to do this," as his cage tightened again and his heart sank a little bit. He did not know what to reply, so he only replied with a "you really are going to do this, Ma'am?"
Five minutes later, another "ping," and another picture, this time was a picture of her, sitting on the edge of his bed with her lover's cock in her mouth - obviously taken by him. His heart sank, his cock grew, and he sat down in his chair not able to think of anything else except what was going on in his apartment - on his bed. He responded as instructed, but no more than a "thank you Ma'am," as he was not able to think of anything else. One more 'ping' which read: "She is going to be busy for a while, finish your work day and wait for her texts," which was obviously written by him. She now is allowing her lover to humiliate him. His cock tightened the cage, and he began to finish his office work, as instructed. He was quite obedient, which she loved about him.