Jill found herself thinking again about Will's cock. She had no first hand knowledge to guide these thoughts, which made the exercise even more entertaining for her. She also found herself thinking about, or rather lusting for, Jim's penis, since it was hers to do with as she pleased. The three of them were dozing in the sun at the edge of a secluded lake that had taken four steady hours of hiking to reach.
The water was surprisingly warm, fed by a hotspring, and they had stripped to their underwear and swam and talked in the water. Jill had straddled Jim's legs as he held her in his arms, which made Will slightly uncomfortable as he tried to avoid staring at the delightful view of Jill's bottom this had afforded him. He was made less uncomfortable by the fact that Jill and Jim clearly wanted him along with them on this trip, and they continued their three way conversation despite their cuddling.
"I'm going to go dry off," said Jill, as she extricated herself from Jim's loving embrace.
Will tried to avert his gaze as she left the water, but his brain quickly registered the tips of Jill's nipples visible through her wet cotton bra, and the curve of her tight ass covered by her dripping panties.
"Let's go join her," said Jim as he sensed Will's discomfort.
Now, lying on their towels in the sun, Jill felt a rising desire to be completely nude. "Will, will it be too weird if I take off my undies to dry?"
"I guess not, as long as Jim..." answered Will anxiously, his words trailing off. He had known Jill and Jim for years, but they had always been fully clothed when they socialized.
"Don't worry, Will, there's no hidden jealous husband in me that you haven't met before, I say enjoy the opportunity!" said Jim in a calm voice.
Jill pulled her bra off over her head, giving Will a playful sideways glance and smile in the process of exposing her pert breasts to the sun. Will felt his stomach jump at the sight. He was thankful that Jim was already laying down with his eyes closed and unaware of the view of his wife he had just gotten. Will lay down and closed his eyes, watching in his mind what he was afraid to watch in reality as he heard and sensed the activities that represented Jill removing her panties and laying back down.
As Jill fell into a half sleep under the warm sun, she found herself experiencing wild thoughts and fantasies that seemed only partly under her conscious control. As the sun warmed the mound of her pussy from outside, she felt an equal warmth rising from within her, and enjoyed the sensation of the blood rushing to fill the lips of her labia. She began to feel the urging of her clitoris to be released, exposed to the sun and to the attention of one or more of the men nearby.
She hugged herself, them cupped and squeezed her warm breasts, enjoying the feel of her hardened nipples between her fingers. Her thoughts went back to Will's cock, but now with a sense of what should be, instead of what could be.
She rolled onto her side towards Will, who appeared to be asleep. She curled into his side and whispered his name into his ear.
Obviously wide awake despite his closed eyes, Will turned his head immediately and responded "Yes?"
"I want to thank you for being such a good friend to me and Jim," she said quietly and sincerely, her eyes moving slightly as she looked deeply into each of his eyes.
Jim's arm found the space that his mind usually expected to be filled with his wife empty, and in his sleep he automatically rolled over in search of her warmth. As his arm covered Jill, Jill's arm moved across Will's chest.