One last rule before bed

The room you're sharing with Robin barely has any floor space other than the bed. A single closet stores your clothes. With the bed against the wall, one of you is going to be tucked in tightly.

You catch a glimpse of Robin changing into her soft fleece pajama bottoms. She almost bumps into you as she bends over to step into the legs. But almost isn't worth much at the end. You want to seal the deal tonight. With all the sexual tension in the room and an aching boner, you need to swing the future more in the direction you planned. A simple rule should help.

As Robin leaves to say goodnight to the rest of the family, you pull out the Rulebook and jot down what you have in mind.

New Rule: As they reach maturity, females have trouble sleeping if without first having orgasmed, and they will get hornier around bed time.

That should seal the deal. A rule that would have consequences all over the world, but you can worry about that later.

As Robin returns, you admire her breasts, perking up in the dim lighting. Her skin is a little more flush than when she left. Maybe Tyler got another good feel in, or maybe she was starting to feel the effects of the new rule.

"I'll sleep against the wall." She suggested. "That way you can leave to pee in the morning without waking me!"

"That works with me." You agree, leaving her an awkward climb over you if she wanted to get out later, and say take care of something.

Sleeping on a twin bed is tight, and you once again find yourselves in a familiar position, with her back against your chest, your hand clutching her left breast, and your penis strongly poking her in the butt.

"Goodnight." She whispered as she pulled up the covers. "Don't get any funny ideas..."

She let the words trail off, leaving you wondering if she was having any funny ideas in that horny head of hers.

You close your eyes and let your body rest. You're feeling kind of sleepy after the long day, but you're not ready to give in yet, you need to wait longer. First Robin tosses and turns a bit under your arm, then you can feel her hand moving into her pajama bottoms, trying to do it subtly without stirring you.

Instead of letting her get away with it, you readjust slightly and scare her off. Another ten minutes and you can feel her shaking a bit in restlessness. Then a woman's moan pierces through the thin walls.

"I wonder who that is." You say sleepily.

"You can't sleep either?" Robin says, rolling over to look at you. "It could be Arianna. Are you thinking of her? Is that why your dick is still so hard?" It had not deflated for a minute.

"Actually, I was uh, kind of thinking of you." It was an awkward thing to say to your sister, but you were getting antsy.

The feeling of your dick pressed against her through fabric was nowhere near enough anymore. You had been naked in the shower, pressed right up against her. You needed that again...

"Uh huh..." She rolled back over, letting your penis poke into her butt again. "I was kind of thinking of you too..." Robin continued. "Of that picture you sent me... Normally I fall asleep in like five minutes, but tonight I can't stop thinking about it."

Another women's pleasure filled cry came through the walls.

"Is that mom?" You ask.

"Then that other voice must have been-" Another whimper cuts her off. The other woman was Rose. "Well they're having some fun tonight... Kind of makes me wish..."

"Wish what?"

She was silent for a moment, building up the courage to speak.

"That something special happened between us tonight..." She quickly continued. "I know we're siblings, but I really like you, and to be honest, I'm really horny. It wouldn't be a continuing thing, but just for tonight, maybe just for this weekend... Will you fuck me?"

"Those words are so dirty coming out of your mouth." You say as you kiss her neck, and push your body closer to hers. "I want you so bad right now!"

"Then take me!" She pulled down her pajama pants, leaving her bare butt, and you quickly pull down your own.

Your penis jumps up to attention, quickly finding the juices that have been running down her thighs. With a little readjusting your press into her soaked pussy. You can feel her left hand snake down and delicately begins rubbing her clit.

Each thrust into her warm inviting pussy was stronger and harder, before long they were shaking the whole bed, and Robin was fighting to keep her moans of pleasure under control.

After a long day spent full of sexual build up, you reached climax quickly, blowing your load deep in your older sister! In the heat of the moment, you feel her pussy clamp down on your dick as she gave in to her own orgasm.

You lay there panting, the bed heavy with sweat, your penis still deep inside her, your cum slowly dripping out of her.

"Tomorrow..." She said she she fell fast asleep in your arms.

It seems women fell quickly asleep after orgasm, you could hear no one else in any of the rooms. You briefly wonder if anyone else had heard you two, but sleep takes you too soon enough.

%%%%%%%

In the morning, you wake up early, no longer inside Robin, but still covered in sticky cum. You must have fell out of her during the night. Stealthily, you make your way down the hallway to the closest washroom.

Taking a moment to pause and glance into the living room, you can see your cousins lying asleep on the couch bed. The covers are askew, and you can clearly see Tyler's hand deep in Susan's pants. Obviously, they had some fun last night too.

&&&&&&&&&&&&&&&&&

Unsexy stuff below:

I've finished the story that I wanted to add, thank you to all the authors before me. I enjoy this version of Michael's story quite a bit.

While playing with the borders of consent in fiction can be exciting and sexy, playing with consent in the real world is not. The statistics for sexual **** are disgustingly high, and trying to blame it on men as a whole only makes us fume. We need to work together to make sure everyone has fun and everyone is safe.

Here are a few general points I want to bring light to:

If someone is too drunk to say no, then they are too drunk for sex.

**** is very frequently involved in sexual ****.

Sexual **** is frequently perpetrated by someone the victim knows.

People who were drunk while assaulted may minimize the severity and impact of the ****.

It is difficult for people to report sexual ****, especially if **** was involved.

Please be safe out there, and look out for each other, and keep the playing with consent in the fiction!