Forgotten Sibling

You quickly strip and enter the shower, you helped each other clean you might have spent a bit too long cleaning her breasts. Short while later the two of you are out of the shower she gets dressed but you head upstairs to figure out how to contain her cock without resulting in torn shorts.

You had just decided on some loose sweat pants when Ellie's cock started to get hard. What's going on with her she clearly said she'd need an hour to recover but here it is getting hard again. Quickly you shove the cock down one leg before it comes to full hardness and head downstairs to see what was going on.

You turn the corner on the stairs and you spot Ellie hugging an unknown girl, she looked weirdly familiar. Your Girlfriend starts to make out with the girl and pushes her onto the couch. Your Girlfriend was between her legs as she was making out with her, you were practically standing over them before they noticed you. Shaking your head you say "Well, who's this?" Whoever this was had gotten your Girlfriend really excited.

They stopped their antics and Ellie did look slightly embarrassed but she wasn't the one who answered. With a mischievous grin the girl says "I'm Stacy, your new sister!" That does answer all the questions you had, she is the daughter of Ellie and your mom, explains why she was so excited by her. You note that her cock was rapidly losing its hardness again it seems it wasn't ready for another session despite attempts otherwise.

Shaking your head in exasperation again you say "Well, don't excite your mom for now she's... overworked at the moment" Your Girlfriend rapidly nodded her head in agreement. You had completely forgotten about her but she was supposed to show up today, you just weren't expecting her to show up just after breakfast.

"You think we can bunk together?" You were pulled out of your thoughts by her question, looking at her her line of sight was below your waist. Looking down yourself you see Ellie's bulge in your pants, but you were shocked by your Girlfriend when she says "That is an excellent idea!" Her grin shows she was not planning on sleeping "You can be good training for John" It seems she wasn't even trying to hide what she was thinking.

They start talking quickly about this training and they move to the kitchen, with nothing to do at the moment you sit down on the couch and turn on the TV.

You don't know how long it was but your mom comes down from upstairs and sits next to you. She rests her hand on your leg or more specifically your Girlfriends cock she leans into you and whispers in your ear "Whip it out"

You pull your sweat pants down and your mom grabs the large cock starting to stroke its length. Her hand goes down to its base, you thought she was going to lean down and start sucking it but then she lifts the cock up off you. With a grin on her face she stands up and walks to the kitchen with it. You were stunned you had no idea how she got it off you were sure the strings were secured in the loops, that's when you realize that your mom was walking away with it.

You just got up and got a single 'Hey' Before she turns to you and puts a finger to her lips and sends you a wink. Then she enters the kitchen after securing the cock to herself, you've no idea how she managed to hide the cock in that tiny skirt.

You hear happy squeals from your mom as she is introduced to her daughter. You tried not to look nervous as you went into the kitchen your Girlfriend looked at you and you could tell she was hoping for another intense meal but you couldn't do that you didn't have it anymore.

Your mom didn't make any moves at lunch, but when she heard that Stacy was going to be sleeping in your room she said to Ellie "You can't just start fucking her the first day, give her some time to settle in she will sleep in my room until then" after lunch they kicked you out stating 'Girls only' you heard them say something about outfits before you were kicked out not that you were that interested. That got you thinking though, looking over you only saw one small bag of clothing and nothing else.

You sat back down on the couch to pass the time hoping your mom wouldn't get in trouble with the cock.