Yes

You hear giggling from your parents bedroom when you finally stumble up the stairs to it. The door is open, and the lights are on, so you enter without knocking.

"Oh hey..." your father says as you walk in the door. You can see he is in a bit of a shock. His pants are around his feet, and kneeling down in front of him, your mother is attempting to remove his black underwear. His penis is erect behind the underwear and his hands are caressing your mother's face. "What are you..." he starts to say when your mother cuts him off.

"We've been home for 10 minutes now...." Your mother says, giving a somewhat perplexed look. She's definitely drunk, as her words are slurred. "We didnt think you wanted to talk about it any more, so..." she smiles and removes your father's underwear.

Your jaw drops when his cock springs to life in front of you. You definitely did not expect your mother to do that. Your father did not either. His hand shoots in front of his cock, trying to cover it, but he doesn't realize the angle that you have isn't blocked much.

"Uh... as you can see, your mother and I are a bit occupied at the moment..." Your father says, blushing profusely. You are still staring at his cock though. His words are really hard to make out as your mother smiles at you and starts to lick the far side of his cock. "Are you listening to me?!" he says, slightly irritated at this point. He looks to you, and then to your mother.

"What the harm..." your mother says, kissing up the side of his cock, and then to his balls. "whats the harm in him watching?" She then buries her face in his leg, kissing the underside of his balls.

"The harm is that he's our SON, sweetheart..." Your father says looking at you, and then moaning a bit as your mother starts to lick his balls faster. "Oh shit...you know I love that spot..." he says, his attention no longer focused on blocking your view of the blowjob.

Your mother jerks your father back and forth a few times, and then smiles at you again. "We can talk after this if you want to stick around and watch..." Your mother says, with a wink at the end.

Your mouth is stuck open, and the only other thing you realize is that you are turned on by all of this. Perhaps more so than when you were peeping on Tommy the other night.

Your mother then takes your father full in her mouth and sucks him off a full stroke. There is a loud pop at the end, and your mother giggles. She licks him down the side of his shaft again, staring at you intently.

"Stop teasing me like this..." Your father says to your mother. He turns to face you. You can see he's turned on as all fuck, and so are you. "are you enjoying the show?" he says finally, and turns back to your mother, who is jerking him back and forth with her hands.

Your mother whispers something and giggles. Your father's jaw drops and all you hear is "NO." He looks at you. "No." he says again as if telling you something.

Your mother whispers something again and starts to kiss the far side of your father's cock again. He shakes his head and pulls off his shirt. His chest isn't anything noteworthy, but he's in pretty good physical shape.

"I should go..." you finally say, getting the nerve to do anything other than stare.

"Stay." your mother says, more firmly than you expected.

"Go." your father says, somewhat hesitantly.