You need to read "A Business Affair" to get the background on this story.
After they arrived back home from their business trip Mark & Tina agreed to keep their relationship platonic. This was more Tina's decision but as Mark didn't want to lose her as a friend & business partner he went along with it - besides at least this way there may still be a chance between them further down the track.
Months passed since the last business trip, although it was always in the back of their minds, but it was long over and never spoken of. Mark attempted to broach the subject on many occasions but was always shut down by Tina. Mark had reluctantly began to face the facts that their previous trip was nothing but a once off, albeit a great sexual escapade.
It was late one Friday night in winter at the office & they had been working on a huge proposal for one of their biggest clients. Knowing that they would have to spend the whole weekend to complete this proposal, Mark suggested to Tina that they call it a night & meet at his house tomorrow morning at 9am to get a full day in. That night all Mark could think about was Tina's tight little body & he couldn't get out of his mind every detail of his last business trip with her and the mind blowing sex they had both enjoyed... He could think of nothing else but how good it was being inside her. He decided that tomorrow he is going to make his final move & if she turns him down again he will force himself to get over her forever.