Mistaking Mom for Sister

[sirhugs]

I'm not usually big on Mom/son or brother/sister but what if there was a brother and sister into incest. One night, Mom passes out on sister's bed. Son crawls in expecting sister sex....

 

[Five_Inch_Heels]

Passing out implies drunk or otherwise incapacitated and that's as No as a No gets.

 

[Brandnewbuddy]

Yeah.

I think if you want to play with a mix up, costumes AND a dark room are the way to go.

Family is throwing a party and as things die down, bro feels a message being slid into his pocket. It’s from sis saying “downstairs-half an hour, keep the lights off and lock the door”

He goes to the downstairs guest room. The little bit of light he lets in before closing the door shows a tights clad buttocks positioned up in the air. Sis and mom were both wearing tights but in his eagerness he closes the door before checking if they were the same style, he yanks the tights down, eats her out for a bit (mom also waxed) and then fucks her hard, only finding out about the switch when she starts whimpering and calling out his dad’s name.

Meanwhile sis is downstairs, ass up in the darkened game room, bent over the couch, no idea dad got a letter from mom telling him to come downstairs, kept quiet and to keep the lights off

 

[sirhugs]

Passing out implies drunk or otherwise incapacitated and that's as No as a No gets.

not a problem as long as she wakes up before the sexiness starts

 

[OnlyHappyEndings]

Simple scenario, son sees Mom at the sink and mistakes her for his sister. Something about her hair or the way she's dressed. He comes up behind and puts his arms around her. 'I sure would like to fuck that ass,' he says grinding his stiff one against her for emphasis.

Mom spins around, outraged. 'What the hell are you doing?' Son backs the hell off, 'Shit, sorry mom. Thought you were someone else.' 'Who? Who did you think I was?' Son flees the room.

Then begins a game of cat and mouse, with mother trying to catch her children having relations and not entirely sure what will happen if she does.

 

[Rob_Royale]

Simple scenario, son sees Mom at the sink and mistakes her for his sister. Something about her hair or the way she's dressed. He comes up behind and puts his arms around her. 'I sure would like to fuck that ass,' he says grinding his stiff one against her for emphasis.

Mom spins around, outraged. 'What the hell are you doing?' Son backs the hell off, 'Shit, sorry mom. Thought you were someone else.' 'Who? Who did you think I was?' Son flees the room.

Then begins a game of cat and mouse, with mother trying to catch her children having relations and not entirely sure what will happen if she does.

I like this, but in my minds eye I see him mistaking his mother-in-law for his wife.
"Damn, babe, that ass is looking good." he says and takes her hips in his hands, grinding his crotch against her ass. "Do you think, we can have some fun tonight?"

She grins and lets him grind away for a while before replying. "Sounds good to me, if you don't think my daughter would mind."

 

[OnlyHappyEndings]

I like this, but in my minds eye I see him mistaking his mother-in-law for his wife.

Absolutely, applicable in many situations. But in that case he could say he thought she was his wife.

If mother and sister are the only women in the house, who did he think she was? There's your tension.