Madeline reaches back and caresses Dr. Giles' balls.

Madeline could sense the old man was getting close to climax, or at the very least was well on his way. She could tell by his rhythmic movements that he was hitting just the right spots for his own pleasure. Madeline enjoyed it too, of course, she was a slut. She didn't feel completely near climax but she might reach there. But she was there to make Dr. Giles feel good, she thought. Right?

Slowly Madeline moved her arm beneath her and reached back. She felt for his shaft and as she reached out with her fingers and touched him his rhythm changed. He hadn't expected her touch. He thrust again and Madeline met his balls with her hand, caressing it gently as it came in her reach.

"Uhmmmmmmmmm shhhhhhhhhit" he moaned at the unexpected pleasure.

Her fingers continued to play with his balls each time he thrust forward inside of her. Opening her hand, releasing him as he pulled his cock part way out with each thrust.

Dr. Giles' hands squeezed her hips harder as he thrust with more passion. Madeline felt herself near her own climax, she was feeling easy tonight--and she used her hand to instead rub her clit herself. Her loins exploded into a flurry of pleasure as she tensed up and came.

"Ohhhh Ugh!" Madeline let out a hushed moan, so as to not draw too much attention "Yessssssssssssss Ooooooooo" she cooed as he kept thrusting adding to her sensations.

"Ah fuck." Dr. Giles said as if resolute he couldn't hold out any longer. Maybe it was the way Madeline moaned as he penetrated her, maybe it was her constricting pussy wall that wrapped eagerly around his shaft as she came.

Madeline focused her hand on his balls once more and that was the **** knell.

"Ogh! Ghuuhhhhhhhhhhhhh!" He let out a groan of pleasure as he let out his warm seed into Madeline's warm pussy. He thrust less than half dozen times, convulsing with pleasure as he felt Madeline's fingertips on balls adding heightened sensations he probably had never enjoyed with climaxing.

"Mhmmmmmmmmm" Madeline moaned, almost to herself. She was a slut. She enjoyed pleasuring Dr. Giles, even though he was old and his days of being possibly handsome were long behind him. She also enjoyed how she felt, even as he pulled out of her and she could feel the trickle of warm cum drip out of her.

Luckily she couldn't get pregnant with the implant she had from the vault. It would be years before she would have to worry about that. Dr. Giles knew that too.

"Wew" he sighed as he hastily zipped up his vault suit "that felt good. Jesus...." still almost in dismay from his experience.

"Glad you enjoyed yourself doctor." Madeline said as she pulled up her suit and zipped it up. She could clean up shortly under the pretense of using the bathroom.

"I can't wait for guard duty tomorrow." he said as he grabbed his rifle and put on the act of looking around to see if anyone had heard their escapade.

Madeline smiled, was she being slutty or was she putting on the act...Ward didn't know she had made this deal with Giles, but Giles didn't know she had the same agreement with Ward. Best if they didn't know.

"Oh I am sure." she said teasing "Well, I'm getting some sleep." and with that she walked back to their camp, Dr. Giles' eyes following her closely.