Tied up threesome

As they tied him to the bet she realised how wet she actually was. The female couple had just tied down their boyfriend, and now we’re in for a hot night where anything goes. “Is the rope too tight?” Samantha asked, “no it’s just right” he responded with an air of anticipation.
“I think I need some more lubrication, do you have anything?” He didn't respond immediately but then said: "No." She rolled her eyes at this obvious lie. They all know what each other has. That's why she'd brought the special bottle of lube from home.
"Well let me see your cock again. Maybe if I can make it stand up like last time there will be something left for me to suck on after tonight?" And so he showed her his erection as best he could, knowing that any movement would cause excruciating pain.
She grabbed the bottle and poured out a little bit onto her fingers. As she did this she felt the two men watching her intently. She looked up at them and smiled slightly. Then she began to rub the liquid into his penis, which slowly got harder under her touch.
With one hand still holding down his legs she used her free hand to get his pants off, and then she began to stroke him. At first she stroked him very gently. Just enough that he could feel it but not so hard that it hurt her wrist.
The sound of the small plastic cap being pulled off the bottle sent another shiver through her body. Her nipples were already erect, but this was something else entirely. She began to stroke him faster, pumping his shaft as fast as she could with both hands. His eyes opened wide and he gasped as he watched her stroking his dick.
“Tighten the ropes” he moaned as his erection grew. He knew that he couldn't hold back much longer.
Samantha did as she was told. "Now, this is going to feel really good if you can bear it" she whispered in his ear. She moved her face closer to his. The smell of her arousal filled his senses, but it wasn't enough to make him cum. In fact the more aroused he became the less likely it seemed that he would release.