Living room

Returning to my room I saw Alex there now wearing normal clothes and she blushes at me before turning away. Feeling heavily in the mood I decided to tease her a bit "Got any plans today?" She almost jumped but she replied "Uhh, Your- Your sister." I emphatically nodded my head and replied in a tone that implied I knew she was going to be sexing up my sister "Ah, yeah all day alone with my sister huh? Well have fun."

I then proceeded to undress in front of her, removing my shorts in a way so my cock was swinging at her. Her eyes locked to it as she blushed harder. She did try to pretend like she wasn't bothered like normal but she never could get out a word. I pulled up boxers and she like broken out of a trance just runs out of the room.

I didn't have any plans today, I now knew my sister was going to be spending all day with Alex so I had all day to spend with my mom. I moved to the living room and sat on the couch in my boxers, I watched as my mom walked by and got an idea. Ness was probably reading my mind because she arrived shortly after I had the thought still in her pajamas. she shoots me a devilish smile as she says "So, bro want to fuck now? We got all day~" She was crawling on the couch to you until her hands pushed you down laying you down.

She spoke just loud enough that 'our' mom heard her but didn't prevent it as she suddenly found herself in a spot she couldn't be spotted. Ness quickly pulls out your hard cock, "Oh, you're hard already? Don't worry let your slutty lil sis take care of it." She grins at me and I know my mom can hear her. Being a succubus she doesn't need prep and lines herself up with my cock. "Haa~ Yes please" lowering herself she lets out a loud sexy moan.

She made a movement with her hand that drew my eyes past her to a mirror that wasn't on the wall before. It was angled in such a way that I saw my mom, she was seated on a table her hands busy touching herself as she watched us. My mom was getting off on her son and her daughter having sex on the couch, maybe she didn't need as much work as I thought she did. But I didn't get much time to think about it when Ness's pussy that was clenching on you tightly started to move as she started to bounce on you.

As much as I wanted to watch my mom Ness was a succubus making it impossible to ignore her. From the constant teasing with my mom to the knowledge that she was watching and the perfect pussy wrapping around my cock I found myself holding back my cum. But Ness was having none of it as she spoke "Come on bro! No need to hold back, cum in me already~" With her enticing words my cum was **** out and shot into her, unlike the last time though either from my increased capacity or that my powers increased when she stood up she had a lot of cum leaking from her pussy. With an exaggerated movement she brought some of it to her mouth. "That was fun I'm going to take a shower and clean all this cum up, you really shoot out a lot as always"

As she left the way she walked caused my eyes to be drawn to the cum trailing down her leg. I close my eyes enjoying the aftermath of having sex with Ness it really was draining though. But it turns out I had completely forgotten about my mom, luckily I was in the perfect state to pretend to be asleep. I had also forgot to put my cock away but my mom had taken advantage to clean me up. My mom was skillful with her mouth, but I had already came twice today and she kept up with her work. She started to let out a pleased hum that further pushed me along and she seemed to know when you were going to cum as she tried to gulp it down. However it seemed my increased capacity was too much for even my mom's expert mouth, she ended up making a strange noise and pulled away. "Mhhn~ So good~" Even with my eyes closed I know my mom is letting the last of the cum splash over her face.

Then after I finished she tucked me away and left, I never got to see her cum covered look. But when I looked at the time I realized it was time for dinner. It was a miracle my sister didn't spot anything, but it made sense she was occupied by Alex.

When I went into the kitchen my mom was wearing normal clothes "Go tell everyone that dinner is ready" her eyes trail down before she says "and go put on some pants." She was acting as if nothing happened so I turned around and went to my sisters room, I've no doubt that Ness already knows and knocked on the door to my sisters room. Then after a few moments the door is opened, I note that neither of them are in anyway undressed or flushed. Spotting one of my sisters makeup boxes opened I realize that they weren't, but when they looked at me it seemed like they were trying to hide something so I just say "Mom says: Dinner is ready" and I turn around without closing the door.