Groan after groan after groan spewed from the invisible lips in wave after wave of ringing orgasm until it seemed to Greg that the man must be nothing but a giant reservoir of sperm that pumped endlessly from his cock into the waiting belly of his groaning wife.
And then it was finally over, after several long passion-drained gasps. There was silence except for the heavy sounds of after breathing and a few last fleeting mewls of pleasure from Janet.
They were quiet for quite awhile and Greg could hear nothing but a few low, indistinct murmurs coming up from the opening of the vent. His own cock jerked slightly in his hands as he thought of Martin's long hard penis deflating slowly inside his wife's semen flooded vagina and he gave it a slight squeeze and forced it back in his pants. He was afraid they might come out soon and he did not want to be here to face them and give Martin the added triumph of knowing he had heard the entire thing.
His prick stayed hard in his pants. He had never heard anyone make love before and the obscene sound of his own wife getting fucked by another man had strangely excited him. Greg was no longer wronged husband, but an excited listener. His mid-western morals wanted him to run now from the boathouse but his impassioned body rejected the idea, too taken up by the thought they might do more, to move from the spot.
He did not hear the soft footsteps that tiptoed up behind him and the triumph that flickered through the woman's eyes as she gazed down at his head pressed tight against the ventilator opening. Darlene knew that she too would have to play the part of the wronged woman to be able to carry this out to it final result and not spoil the ultimate plan she and Martin had so carefully devised for this young, naive couple.
"W-What are they doing down there?" she whispered softly in the half darkness, so as not to startle the unsuspecting Greg and cause him to cry out.
He turned his head quickly, his face flushing from the sudden embarrassment of being caught like a peeping tom but regained his composure quickly when suddenly it hit him that they were in this thing together. After all, it was her husband down there balling his wife.
"Shhhhh," he raised her fingers to his lips and whispered secretly, a grim look shrouding his face. "I–It's Martin and my wife. T-They're making love."
Greg's face flushed from the crude admission and he was suddenly thankful that the light was dim and she could not see his embarrassment.
"I don't believe you," Darleen whispered back indignantly, her voice almost breaking from trying to hold back the laughter at the utter naivete of his statement.
"Come here then," he moved aside slightly and motioned for her to join him at the opening of the vent. Darleen carefully lowered herself down beside him and pressed her ear next to his. She listened for a moment and then turned to him.
"I don't hear anything," she said softly, a feigned doubt in her words.
"Wait just a moment and you will," he assured, his voice barely audible.
They lay silent for a moment longer and then Darleen felt Greg's body tense next to her as a soft, low murmur broke from the cabin below.
"Ooooooh Martin, your fingers feels good between my legs like that." Her words were broken by the soft rustling of the sheets as bodies twisted around on them. Then the feminine voice gave another soft intake of breath and moaned, "Ohhh, darling, that feels sooo good."
"I–I just don't believe it!" Darleen whispered, forcing a look of strained indignation on her face. "T-They wouldn't dare."
"Shhhhh," Greg cautioned again, suddenly becoming aware of the softness of Darleen's breast pressing tight into his arm. "They'll hear us."
"Alright," she nodded her head in agreement. "Let's give them plenty of rope to really hang themselves."
Greg turned his ear back to the vent in silent assent and listened intently for the next move from below. It came a second later.
The male voice crooned up through the darkness: "Get on the floor on your knees. I want you to kneel in front of me and suck me like you did the first night."
The answer was a gasp and exclamation of: "Oh yes, I want to feel it in my mouth. I want to feel it come again so I can taste it on my tongue."
The sound of weight lifting from the squawking bunk filtered through to their eager ears and then the slight noise of movement on the floor as Janet obviously positioned herself in front of Darleen's standing husband. Greg could hear Darleen's breath becoming heavy next to him and imagined a slight pressure from her breast digging into his arm.
She turned toward him, her lips wet from the circling of her tongue and whispered softly: "Let's sneak around to the porthole and watch them. Then we'll really know."
Darleen knew without a doubt that this would be the final breaking point for Greg. She was already aware of the hardness under his trousers and the way he had turned his body to hide it when she had first spoken to him. Yes, this was going to be easy. Easier than Martin seducing Janet and she going to thoroughly enjoy it. Particularly when that proud little bitch's turn came to catch she and Greg in bed together.
"Come on let's go," she rose silently and pulled him by the arm when he hesitated. "We may as well get the full show."
Greg followed quietly behind her as they slipped silently off the boat and tiptoed along the pier to the lighted porthole. There was foreboding in his mind. It was one thing to hear someone making love to your wife, but to actually see it being done was another thing. But he had no further time for misgivings as Darleen pulled his head over by hers to the small rounded glass.
A gasp came from his throat and his body tensed at the lewd sight that greeted him. There before his very eyes was his pure, young wife kneeling on the floor in front of the naked Martin. His hands were tangled tight in her long silken hair, pulling her face into his loins. Her thin lipstick rimmed lips were moist and she was running them over the flesh of his passion-swollen cock. He had never seen such a wild, abandoned look on her face before. It looked as though she were almost insane, her eyes bulging wide and locked straight ahead on the monstrous penis surging out from his belly. And God, no wonder, he thought, secretly marveling at the size of it. It was almost an inch longer than his own and much thicker. A pang of rejection shot across his brain. He could never grow that big and in spite of his wife's clean, innocent purity he found himself suddenly understanding her violent passion at the hands of this man. A jealous rage grew inside him and he wanted again to smash his way into the cabin and destroy them both but his eyes would not release their grip on the lewd spectacle going on inside.
"God, she's going to eat him alive," Darleen chided him. "Your sweet, young wife is going to suck my husband's cock."
She knew the words would only serve to increase his already smoldering passion rather than drive him to anger. She had seen it too many times before when she and Martin had arranged this little introduction for others. She had seen the sudden first burst of anger and indignation from many a husband and then watched it turn slowly to a masochistic kind of passion that excited them beyond all reason and thought. Greg was almost at that point. It would only take a few minutes more.
And she was right. Greg watched, hypnotized into immobility by the cruel exhibition going on a few feet in front of him. His breath came in small, deliberate gasps as he watched his wife's fingers teasing gently at Martin's testicles, at the same time swirling her tongue lasciviously along the underside of his huge hardened penis from the thick trunk-like base slowly out to the menacing blood-filled head. He could see a slight drop of glistening seminal fluid left over from their orgiastic climax of a few moments ago that hung precariously on the tip. Janet leaned her head back a few inches and stared trance-like at it for a moment, then leaned forward and hungrily licked it away with the tip of her tongue.