Alice is playing with Kim's dicks and she hasn't noticed you

You turn your head around and see that Alice is the one who has been rubbing your body all over Kim's musky crotch. You hoped that now they would notice your shrunken form there, but they seem to be distracted by the conversation they are having.

"It feels weird touching someone else's." Alice says with a note of curiosity in her voice.

"Well here, let's see if this feels weird." Kim replies as her hand flies out and grabs her sister’s crotch. As Alice is getting her privates rubbed, the look on her face is pure bliss as she stares off into space.

"That feels weird, but in a really really good way." She says with a smile.

Alice than goes back to rubbing Kim's crotch and unknowingly shoves you back into it. This time however you can feel the giant tent forming in your sister’s pants as her dick gets harder.

"Now that you are 18 you are going to have so much fun with me and mom."

“I wish Willy could join in on the fun.”

“Maybe someday, but Mom doesn’t want him to know yet. Plus, just between you and me, I think I like girls better.”

You can't believe what you’re hearing. Even though it's one thing to be in this predicament and to find out both your sisters have cocks, but apparently Kim and mom have been going at it. And now Alice gets to join in! Thinking about your family rolling around the bed together causes your dick to grow hard just like your sisters. (Though nowhere near as big)

"Want to give them a taste." Kim says in a sultry way.

Alice's hand moves away, freeing you for a couple of seconds until Kim's hand comes crashing into you. She unknowingly pulls you up and under her pajama's waistline as she pulls them down. Now the elastic waistband of the pants have you pinned in between your sister's balls and right under the base of her steel shaft. You look up and see that Alice is transfixed by not one, but two colossal cocks as she leans in closer to get a better look at them. From the current angle, and with her pajama bottoms removed, you could see that, behind the dick you were strapped to and attached to your sister's crotch just above it, was a second dick. So you thought of Alice, thinking that she would probably have two dicks too.

"Well, are you going to just look at them or suck them?" Kim said

Without thinking, Alice starts to suck the members alternately while Kim moaned in pleasure as her dicks grew firmer and harder. She starts slowly but then picks up the pace and starts blowing like a pro. Alice pulls the dick out of her mouth with some pre on her tongue.

"They're good, but I want them somewhere else." Alice said, then got up and took off her pajama bottoms, revealing her hairless pair of hard cocks. She turned her back on her sister, spreading her buttocks and offering her ass and wet pussy to Kim.

"You don't see the time, do you?" Kim said and got up quickly causing you to be thrown up and land on the tip of her lower cock

You didn't even have time to try to leave the premises before your big sister started fucking your little sister, sticking her lower cock in Alice's pussy and the upper one in the younger's ass. When that was done your left arm slipped under her foreskin, causing you to be pinned to her cock as it was thrust in and out.