My sister Denise

Denise is standing in the doorway, her mouth is open in astonishment. Her hair is somewhat deranged and the inner sides of her thighs are glistening with what I except to be a mixture of mom´s cum and her juices. As she notices me staring, Denise bites her lower lip for a moment before talking to me.

"That is quite an impressive load little brother, at least for a male." A compliment served with a little tease, typical for her.

"I´m sure you know the difference very well." Referring to her fucking with mom I witnessed in the kitchen. This time she blushes and I must admit, that looks quite cute.

"You had fun too sweety? It´s very nice of you to help your mother, she really needs it. And I´m sure you enjoyed it also." Diana's words embarrass my sister even more.

"I´ll head for a shower. Again. Don´t peek pervo!" She hastily turns around and runs up the stairs. Me and Diana look at each other and we both can´t constrain a short laugh.

At this moment mom enters the room and looks at us questioning. "What´s so funny?" When she realized our still naked bodys and her friends tits covered in my cum, she quickly looks somewhere else.

"Oh, we were just joking about what a hypocrite you are, acting so prudish and then going into the kitchen to fuck the hell out of your daughter." Diana teases my mother.

"I... How...I mean..." Mom stammers while blushing even more than Denise before.

"Oh, it was just a guess until you confirmed it." Diana smiles evily. "Can you finally be honest with us and yourself now?"

"I, I don´t..." She suddenly starts to cry silently and Diana stands up to get close to her. "You two looked so..." Her voice fades.

"Oh Darling, you don´t have to cry." She stands naked and somewhat helpless in front of my mom. "I would love to hug you Angi, but I´m covered in..."

Mom stops her by pulling her closer for a long hug and lays her arms around her friends back. I can´t deny that the thought of my cum smeared onto mom´s chest by that hug, even when it´s through the fabric of her dress, arouses me a lot and my cock twitches, showing signs of life again.

"I´m such a terrible mother." She sobs on Diana's shoulder. "How can I throw myself on my kids? I´m nothing but a dirty slut."

I know I´m a terrible person, growing a boner the moment my mother calls herself a dirty slut, but I can´t stop it. I approach them, but Diana stops me on my tracks.

"Colin I think you have to talk with your sister. Don´t worry, I´ll take care of your mom." I nod and turn to go upstairs as she stops me again. "I think you might get dressed first."

Quickly I throw on my shirt and boxers, than I run up the stairs, leaving the two alone.

"Denise, please open the door." I am staying in front of the bathroom, hammering against the door with my fists.

"Go away sicko. I told you not to peek." She angrily answers.

"Denise, please. We have to talk. Now." I beg her.

First silence, than a quiet "Why?"

"Hm, let´s think, oh perhaps because you and Mom fucked on the kitchen table?!" Now I am the angry one.

"Did.. did you see it?" She shyly asks.

"Mom shoving her cock into your vagina? Yes, I did!" I´m slowly getting frustrated by the course of our conversation. "Listen Denise, do we really have to talk through the door?"

A short pause, than I hear the door unlock and moments later she opens for me and takes a step back. My sister is wrapped in a big towel from her chest down to her lower legs, all her clothes laying on the floor in a heap. "Come in if you have to." She finally gives in.

"Sorry sis, I don´t want to pressure you, but you have to finally tell me some things." She silently nods and I continue. "Since when do you and Mom fuck?" I´m not sure why this has to be my first question, but it simply blurts out of me.

"About two years now. It started shortly after my 18th birthday." Her answer is emotionless and I feel sorry for her, excepting the worst.

It hurts to see her like this and I´m in fear of the answer, but I have to know. "Did she **** you to..."

"NO! That´s sick!" That was quite an emotion. Much more silently she adds. "If anybody **** someone it was me...." I stay quiet and she goes on. "To be true, I seduced her."

My jaw drops to the floor. "You what?" My eyes are wide open in surprise.

"I was so sexually charged by then, I just had to. I knew about Mom´s 'condition' for a long time because... doesn´t matter now. Anyway, I just craved for sex at that time. Sex with her. I tried to turn her on. Bent down in front of her and pressed my ass into her crotch 'accidentaly', undressed the moment she entered my room, stuff like this. And finally she gave in to her lust and we fucked. Oh and how we fucked. Since then we do it quite regularly, but still to rarely in my opinion."

I´m stunned by her honest and perhaps to detailed answer. The pictures in my head give me a raging boner in no time. "Then why the hell is she so stubborn about fucking me?" The moment I speak it out loud I notice I said fucking and not feeding.

"That´s because... She want´s..." She is struggling for the right words. "She want´s to protect me. Me and you." A short pause. "Oh and she still thinks **** is bad."

"But why? What do you have to be protected from? And why me when I openly say her it´s ok. I don't understand this woman."

"Because she doesn´t want you to find out..." She bites her lips and goes silent.

"Find out what? Jesus Denise, tell me what´s going on." I´m really getting upset. My sister is fucking with my mom for years, knews that she´s a futa even longer and everbody seems fine to have secrets from me. That´s fucked up.

"I... I plead here. I thought if you found out, you would no longer love me. You would hate me, find me disgusting. I thought if you knew, you wouldn't want to be my brother anymore." A single tear is running down her cheek and her voice breaks.

I step closer, laying my arms around her and pull her into a close hug. At first she tries to get away, but finally she gives in and cries at my shoulder. "You little dumb. I will always love you. I will always be your akward, pervert, sicko brother and nothing will change that." I try to lighten the mood a bit with my honesty. "Mom fucked my throat this morning. The doctor encouraged here while she fucked my ass and I can´t deny it was hot. I have often jerked off while thinking about her before, so you two fucking is definately not a problem for me."

"As I said, you are a pervert." She comments slightly smiling. "Our sexual intercoursions are not the core problem."

"So what is it? You can tell me anything and I will not think any worse of you." I gently stroke over her head. "So, did you kill someone? Should I help you get rid of the body?"

"Idiot." She even laughs a little bit and that´s definately better than crying. "Did you really not see it, when...?"

"When I caught you and Mom in the kitchen?" Fuck, now my dick is getting up again and presses against her thigh. There is no way she doesn´t notice that.

"Just. A Sick. Pervert." She chuckles. "You are just a pervert, I was always right." She chukles even more, but she doesn't move away from me.

"Can you really judge me for getting a boner from that? You looked so hot with her cock inside." I confess honestly.

"Sicko." Again she chuckles, but than she turns more serious. "Do you really think I looked hot?" Her question is outspoken in such a uncertain voice, it´s incredibly cute.

"You always look hot dummy. The view of your perfect little ass in those damned soccer shorts has given me more hard-ons than I can count. And even when I always joke about your boobs, I think they are just perfect. Last but not least, your cute face on such a beautiful body on top. Fuck, for me you are the definition of hotness." I´m myself surprised by my honesty. For a moment I feel something pressing against my thigh, perhaps her leg. But than she finally breaks our hug and takes a step back.

"You are not kidding with me. You really mean that, right?" It looks like she´s still unsure about believing me.

"Yes, why should I hmmm." She suddenly closes the distance between us again and silences me with a kiss. At first I am totally taken aback, but then I return the kiss passionately.

She breaks our kiss and tilts her head to the side, looking at the wall behind me. "You are my perverted little brother and most of the time, your are one of the most disgusting persons on the planet."

"But?" I really hope there is something more to come.

"But you looked so hot with Diana´s cock in your mouth. I got so wet with arousal watching you, I almost fingered myself to an orgasm right next to you." A short pause were she looks at me, biting her lip. "I was so horny. And so jealous." My cock twitches from her confessing and I softly rub myself against her thigh.

"Why where you jealous?" I ask a little confused.

"Colin, I really love you, but sometimes you are such an idiot." She tilts her head back, bringing her mouth next to my left ear. "I got jealous because you sucked her dick and I really wanted you to suck mine instead."

I want to hit myself for beeing so dumb. My sister is also a futa! And it took me only 18 years to figure it out. Not even that, I didn´t notice until she tolds me. So much makes sense now. Denise misinterprets my silence and becomes insecure again.

"Did you understand what I just said?" She shyly asks.

"May I...may I touch it?" She swallows and nods silent. Slowly she pushes the towel aside, revealing her crotch to me. I don´t look down as my fingers glide from her waist over her flat stomach down to her penis. Denise shivers as I touch her shaft and take it into a tight grip. She is as hard as I am. Then I grab her chin with my free hand and turn her face to me. "Did I make you so hard?" I kiss her before she can answer and let my tongue slide past her lips into her mouth. Her moaning into my mouth is answer enough and I slowly begin to jerk her off. Outside the bathroom, I hear footsteps on the corridor, but these doesn´t matter now. We make out for some time just like this. French kissing, me jerking my sisters cock while her arms are laying over my shoulders. I would love to continue like this for hours, but I feel my arm getting tired. In addition, her breathing is becoming heavier and heavier, so I´m sure Denise is getting closer and closer to her climax.

After breaking our kiss, she looks at me puzzled. "Why did you stop?"

I lean my head to her ear. "You know this is a little exhausting for my arm and perhaps I could switch to another part of my body? Like, my mouth? Besides that I´m slowly getting hungry..." Her answer is just a low moan of anticipation, as I slowly sink on my knees in front of her. For the first time I clearly see her dick. It´s somewhat under 10 inch long and perhaps half an inch thicker than mine. The fleshy tip is glistening from her precum and the scent is overwhelming.

"You sure you want to do that?" She gently ruffles through my hair asking.

"If you allow me, young lady?" I use the title mom used for her and she is blushing in an instant, biting her lower lip in anticipation.

"Yes... Master..." I´m very surprised by her submissive answer, but now I´m just focused on her cock. Nevertheless, it certainly can’t hurt to use this newfound knowledge about her kinks.

"The young lady has such a nice cock, I´m sure it will be a pleasure to taste it." You tease her a little bit and the shiver running through her body shows you how much she likes it.

"Please Master, taste it. Suck on my naughty dick with your .... OOOAAHHH." I couldn´t stand it any longer, I just had to taste her finally. The taste of her precum fills my mouth as I wrap my lips around her tip and it´s similar delicious like the other samples I tasted today. Maybe even somewhat sweeter, less bitter. "Hold On. Hold On. I will come if you..." I´m not really interested in her talking, so I just keep going. "Fuck Colin! I...I...OOOOAAAH YEAAHHH OOOAAAHHH!!!!" Her high pitching moans echo through the bathroom, as she ejaculates into my mouth. She grabs my head to stabilize herself, her legs shaking from the climax runing though her body. I greedily swallow her semen, and only then do I realize that we haven't done anything for my own pleasure except kissing. Nevertheless, I'm simply happy as her hot, delicious cum trickles down my throat. When her orgasm is long over, I still suckle on her tip until my sister pushes me away.

"Stop it. Doesn´t yours become extremely sensitive after an orgasm too?" Denise asks while shaking her head.

"Oh it does, I just like to tease you. Young lady." I add smiling. She leans down to me and kisses me, first just softly on the lips, but quickly our tongues get involved too. There is no doubt she will taste herself on me like this and that thought alone makes me moan into her. She chuckles and smiles at me as she withdraws.

"Thanks for the blowjob. I think I´ll go to my room for a nap now. You are fed, I´m sure Mom and Diana are occupied with each other and I have no clue what else I could do." Her towel has fallen down during our makeout session, but she doesn't seem to have any plans to cover up again. Slowly she walks past me, swinging her pretty plump ass, but stops at the door, looking at me over her shoulder. "Or is there anything else you want me to do? Master?"