Sam strode through the door and out to the pool deck. I spun around on the couch up into a sitting position and looked at him, my eyes wide with terror. 

‘I’m dead, I know it.’

With a cold, hard expression on his face, he walked right up to Renee’ 
“Looks like you two have been having quite the time!” he said in a loud, curt voice.
Renee’ began to sob.
“Oh Sam, you don’t understand.’
“Oh, I understand, alright. Get rid of old Sam, so you can fuck the guitar teacher! My God, Renee’, it sounds like a bad romance novel! Do you think I’m stupid?”
I said nothing; having just in the last, few seconds become a religious man. 

‘God, please get me out of this one, and I’ll be good!’

He stood in front of Renee’, his hands on his hips, glaring down at her, every once in a while she looked at me in disgust.
“I see now why you wanted these lessons. I guess my cock isn’t good enough. You need several to make you happy, Renee’.”
He was beet red with anger and growing more so as each minute went by. I thought about trying to leave, but found myself frozen with fear, sitting there, naked, caught like a child with my hand in a cookie jar. Renee’ continued to sob, and began to speak in a choked, unintelligible voice that I could barely understand.
“Oh Sam! I never meant to hurt you! It’s just that, well, you’re never here, and when you are you’re so cold and distant. I’ve been so lonely, Sam.”
He grew silent now, and looked down at his wife, a blank, cold expression on his face.
“I can’t believe you would go to this length, Renee’. I’ve been a good husband to you. I’ve given you a good life, this house, all of your nice things. How do you repay me? By being a slut, by fucking the first guy that comes along. I just can’t believe it. I knew something was up tonight, you know. I left for my flight, and I definitely had the feeling that something was wrong.”
As he spoke, he turned around and walked toward the door, his back to us. He grabbed the back of a pool chair and pulled it back toward us. He placed it about 6 feet in front of the couch, facing us, and sat down in it. He continued to speak.
“I was angry when I found out that my flight had been cancelled, but, deep inside of me, I was a little relieved, because I couldn’t shake this gnawing feeling that something was wrong. I drove back here, and parked down the street, away from the house. I made my way around the house, being very quiet. I looked through that window right there. You were sucking this man’s cock, Renee’. I saw the whole thing. I watched you fuck him with that slut pussy of yours.”
Renee’ just looked at him, her mouth open.
“You were spying on me?”
“Yes, I was. It was really quite entertaining, Renee’.
To say that I was extremely uncomfortable at this point would be a dramatic understatement. At this point, I just wanted to escape with my life. I decided to speak up.
“Umm, Sam, I’ll tell you what. I’m just going to go, ok?”
He looked at me, a half smile forming on his face.
“You’re not going anywhere, my friend. I’ve just begun with you. Patrick Stephens, professional musician, and teacher extraordinaire. You have some interesting techniques, don’t you, son?”
I looked away in shame.
He continued.
“I checked you out, Patrick, the first day you were here. I know where you live, what you do, where you play. Do you realize the damage I could do to your career if I wanted? The way I look at it, you owe me. You’ve taken my wife, filled her with your seed. How do you feel about that, Patrick?”
I looked at him directly, feeling a twinge of uncomfortable anger. I thought about telling him that Renee’ had completely seduced me, but as I considered this, I glanced at her. She was a quivering mess, tears streaming down her face, and I felt a wave of compassion for her.
“Look, Sam. It’s obvious that you and Renee’ are having problems, so why don’t you just let me back out and I won’t bother either of you any more.”
Sam stared at both of us for a long time, not talking, just shaking his head, an angry, tight- lipped expression on his face. To say that I was embarrassed and scared, sitting there in the raw would be a dramatic understatement! 
Gradually, a change seemed to overtake him. Sam broke his gaze, and lowered his head into his hands in a seeming gesture of resignation. I took this opportunity to glance at Renee. She was still crying, her eyes red and swollen, and her whole body quivering with fear. I felt another wave of pity for her. My eyes fell to her body, and focused on her heaving breasts. For a fleeting second I forgot about the situation and admired their shape; the protruding nipples, the large, dark areoles around them, and the perfect, pear shaped firmness that was rare in a woman her age.

‘What was I thinking?’

I turned my gaze from them and focused on the dark form of Sam, who still sat there motionless, his head still buried in his hands. After a few minutes, he raised his head and stared directly into my eyes, and began to talk in a low voice.
“She’s good, isn’t she, Patrick.”
“What?” I said, incredulous.
“She’s good. A good fuck.”
“Sam, please.” I said.
“Just admit it. She’s hot.”
“SAM!” Renee cried. “Stop it!”
He continued his voice an even monotone.
“Is his cock better than mine, Renee?”
She started to cry audibly.
“Patrick, I want you to do something for me. Slide over to her.”
“Sam,” I protested.
“Do it now.”
The way that he said this scared me even more. I slowly slid over toward Renee, my bare buttocks squeaking on the vinyl material of the couch. 
“Put your hand on her leg. Feel that soft skin. Do it now.”
I looked at Renee and our eyes met. We could see the fear and confusion in each other’s eyes. She almost imperceptibly shook her head as if telling me to do as he said. I hesitated, then reluctantly reached out and place my open hand on the tender skin of her leg.
Sam continued with his instructions.
“Spread her knees apart.”
I placed my hand on the inside of her leg and gently pulled it toward me. Renee spread both legs apart. I could feel her trembling.
“Touch her pussy, Patrick. I know you want to. Stroke it.”
I looked at Sam hard, trying to see any indication of what was going on in this unpredictable man’s mind. He just glared back at me, that same stern expression on his face. I slowly moved my hand along the soft flesh of her legs and encountered her soft pubic hair. I noticed that it was still damp from our earlier love -making. I placed my fingers flat across her opening and began to stroke her slowly, up and down. I heard a small, almost inaudible sigh come from her soft lips, and she slid her ass out more on the couch, affording me better access.

‘What the hell am I doing?’

I heard a sound come from Sam. I turned my head to him, and found him unfastening his pants. He opened them and raised his ass up off the chair, sliding them down to his thighs. His hard cock bounced out and jutted straight up angrily. He stared at us, a strange expression on his face, and wrapped his fingers around it. He slowly started to massage it, up and down. I then made the obvious observation that this situation had just taken a very strange turn indeed.

‘He’s being turned on by this!’

I turned my head away from this bizarre sight, and looked at Renee. I continued to stroke her pussy more firmly now, and could feel her wetness increasing. I started to feel hot and prickly, the blood rushing to my face, my cock feeling a very familiar twitch of arousal.
“Patrick, I want you to get on your knees and eat my wife’s pussy. Do it now.”
I looked at him sharply. Sam was stroking himself, his hand gripping his hardness, the bulbous, swollen head showing prominently above his fingers. I knew from his expression that there was no turning back now, that I was forced to do exactly as he said, so I slid to the floor on my knees in front of Renee. I pushed her long legs further apart, bending her knees back. I placed both hands on her thighs and pulled her torso further out on the couch. I bent my head down and extended my tongue to her soft, wet pubic hair. I found her pussy lips and pushed my probing tongue in between them, parting them. I heard her emit a gasp of pleasure.