Sarah said this to Dennis suggestively pausing on the first step looking back at him. Dennis replied, "Sure," not knowing where this was going but eager to follow. As they headed up the steps Dennis noticed that the back of Sarah's panties were semi see through. With that he could get his first good look from behind.
Being a man of newly found confidence Dennis slapped his sister's ass as they were climbing the stairs.
Sarah quickly turned her head and purred "Not yet, I still need to change into something more comfortable for my saviour."
Dennis followed Sarah to her bedroom where she opened the door and walked right in leaving the door open. She turned around before sitting on the edge of her bed and slid her panties off as she sat down. Throwing them away she looked at Dennis and said with a wink, "well, come on in." Dennis was still standing by the door at that point and made a point of taking off his underwear and flinging it away too. Sarah took off her bra and positioned herself on the bed with her legs wide open. Dennis crawled up to eat her out when she stopped him, "no, I'm ready let's go." She breathed. Dennis moved on top to missionary position and pushed in.
Slow at first, Dennis pushed some hair out of her face and gave her a deep kiss. Sarah took in a deep breath and looked him in the eyes. "Fuck me bro" she said wrapping her legs around him. Dennis couldn't handle this, speeding up he arched his back, saying, "Oh yea, that feels so good." Sarah replied, "You feel sooo good!" Dennis couldn't help himself, he could feel himself starting to cum. He could also feel the dream starting to slip away. Dennis tried to hold on to the dream world. It felt like falling backward into a pool and he was grabbing the ladder. His right hand slipped but his left grabbed strong. Dennis pulled himself back into the dream and he was met with the most powerful orgasm he had ever had.
Still holding onto the ladder, Dennis felt the need to hold on tightly diminish. The dream was letting him stay. While this was great, he was still fucking Sarah and him cumming, if anything, set her off. "Oh, oh yes, fuck, ohhh" was much of what he heard from her. Time seemed to slow down watching her two breasts move up and down with each thrust. It was somewhere around this point that Dennis realized that if she came, they'd wake up. Dennis knew he could change things in a dream and knew he could affect people, but could he change people? Dennis closed his eyes and pictured himself turning opaque. Then he moved his body into Sarah's and opened his eyes.
Now looking up from the bed his body seemed to have disappeared and there were two nice looking breasts in his view. This felt different; he was still horny, but no longer had a penis. Wasting no time, he reached down and felt Sarah's folds. Feeling around, he felt a wave of pleasure come over him, "Ah that's the spot." Dennis thought, as he continued to play with it. Working away down there he wondered what it would feel like to have something inside, so he conjured a dildo to appear beside him. Wasting no time inserting it he heard himself emit the words "Oh! That does feel good!" Dennis thinking it strange to hear himself not only say those words but in Sarah's voice. With every thrust he felt a wave of pleasure wash over his/her body. Hair standing on end, the orgasm started, and Dennis just barely held onto the dream. Just long enough to experience a female orgasm, Dennis remarked, "That was good... yeah." Almost speechless and satisfied he let go of the dream and allowed himself to be woken up.
Dennis work up in the morning having gotten a fairly relaxing night sleep but felt strange. Something was off and as he sat up his body felt unbalanced. Then he opened his eyes and realized he was in his sister's room, in her bed, in her night shirt, and still in her body. He proceeded to have a mini freak out, before deciding that he must still be dreaming. Dennis closed his eyes and tried to materialize a muffin in front of him. He looked and nothing was there. Then he listened, and heard the kitchen fridge downstairs, the traffic outside, and the rush of a/c through the vents. "So, I'm awake and I'm in Sarah's body... Where is my body?"
Dennis got up, stumbling at first, but, adjusting himself, was able to make it around the corner to his room. Opening the door his body was still there sleeping as if nothing absolutely insane was happening. Dennis wondered "Can I wake myself up?" and poked at his face. His body didn't respond at all, so he slapped his face. This also didn't elicit a response, so he did one more hard slap; nothing. "So, it seems like I'm basically in a coma for now until Sarah's body goes back to sleep and I swap back."
Dennis said to the room. Like a kid with a new toy, Dennis didn't know what to do first. Thinking he might never be able to do this again he thought to make the most of the day. First, Dennis stripped down, taking a good long look. Moving sideways and back again in his room's mirror, checking out Sarah's ass, Dennis felt a tingling sensation in Sarah's vagina, stronger than the sensations in the dreams. Dennis thought, "I may be in Sarah's body but it's definitely still me inside. Maybe I should have a shower? Sarah usually does that in the mornings."
Dennis walked from his room to the bathroom without getting dressed as there was no one but him to see. He turned on the water to where he usually set it and let it warm up as he continued to check out Sarah's body in the mirror. After a minute or two he stepped in, noting how much colder the water felt today. Turning it up, he used Sarah's body wash, feeling every part of her skin with her hands. Brushing over her boobs he couldn't help but feel another tingle. "Hummm..." left her lips. Getting turned on in the shower, Dennis hatched a plan on how to get off once he got out.
Once out of the shower and as dry as can be, Dennis walked back to his room. He knew he wanted something to put inside him/herself when masturbating, but didn't know if Sarah or his mom had any sex toys, so maybe he could use his body? Dennis pulled down the covers on his body revealing his boxers. He pulled those down and started to squeeze his penis trying to get it hard. Normally it wasn't this hard for Dennis to get.. well.. hard, but he was also usually awake for that. It didn't take long until his penis was good and hard, so he jumped up on the bed and positioned himself over... himself. It was strange for him to look at his body, so he opted for reverse cowgirl.
His/her body was already so ready from the playing in the shower that it wasn't difficult to lower himself down. "Ahhh yes." Dennis heard escaping Sarah's lips. He noted that Sarah's body seemed to have a mind of its own when it came to what was said with pleasure. Dennis proceeded to ride his sleeping body faster and faster, being careful not to let his penis slip out. The mattress and bed frame were groaning with every thrust and Dennis was enjoying every second of this. The pleasure seemed to be greater in real life than in the dreams or was he just really turned on by being able to see Sarah's body for real? "Oh yea! Almost there" Sarah's lips emitted.
Dennis, enjoying himself, didn't think that with his body asleep, some dream rules might still apply. Quickly approaching orgasm Dennis felt again like he was being thrown back off a pool ladder, only this time he wasn't expecting it and wasn't able to grab the ladder.
Waking up in his body Dennis was struck by the orgasm pulsing through his body and the shock of what just happened.
Waking up in her body the last thing Sarah remembered was her dream where she was fucking her brother. Struck by her intense orgasm it took her a second to realize she was riding a dick and not in her room. Sudden panic struck her, turning her head to see an equally shocked Dennis.