Well, not much you can do now. Better get your sleep in and wait for the morning. As much as you want to lay on a pillow or at least an article of clothing, the floor was completely clean. Seeing no other thing to do, you just lay down onto the carpet. It wasn't the greatest bed, but you at least appreciate that the floor was carpeted. You close your eyes and drift off to sleep.
-Timeskip-
In the morning, all three of you woke up at the same time. The alarm the girls share going off. You stir on the floor as you look at the two giant beds on either side of you. You watch as an arm comes from Amy’s bed and turns off the alarm. You notice the alarm was only reachable from Amy’s bed, so if Samey wants to go back to sleep... well...
You stood up and stretched onto the floor, looking at Samey’s bed you see her stir awake. Moving around as you just wait for her to notice your missing. Suddenly! She saw you weren't there and moved around. Looking her head around and whipping her hair, she tried to see where you went, even checking under the blanket. After some more looking she spotted you, on the floor and close to Amy’s bed. Her heart lifted up as she saw you.
Then... all of a sudden you felt a massive weight come down onto you. Amy’s foot coming down and pining you to the carpet. You stomach down and her toes hanging over your head. Samey wanted to yell for you, but as far as she knows her sister doesn't know. She doesn't know that stepping on you was completly intentional on Amy’s side.
“Oh i stepped on your... doll” Amy said playing it up “I thought he was sleeping with you in your bed, just how did he end up here?” She sat on her bed, not even bothering to take her foot off of you.
“I... uh.... i um.... i guess i threw him In my sleep and-” She stopped when she saw you trying to wiggle out from under her sisters foot “Stop! I mean.... i really should stop struggling in my sleep. Stop struggling! Stop struggling!”
Amy loved seeing her sister squirm around nervously, almost like she loved seeing you squirm around under her foot, But to Amy’s disappointment, you revealed yourself and ruined her fun.
“Its alright Samey! She knows! Now get me away from her feet!” You shout. Samey took a moment, realising that her sister knows. Moving fast though Samey went to her sisters foot ready to get you away. Right near her feet Samey was gonna move it, until Amy chimed in.
“Uh uh uh.... not so fast, or ill put a little too much pressure for him to handle” Amy threatened, completely in the driving seat “How long did you think you could hide this from me Samy?”
“What do you want Amy!?” Samey said, still down there by her feet. Amy one up to her sisters face with a victorious smile.
“Oh many things, one thing that i do want is this little guy. He's mine now, you understand me”
Sammy’s heart was broken after this so of course she fought back “Yours... thats thats not fair! I found him first”
“So!” Amy rudely countered “I want him so I'm keeping him. Thats the way its always been. I get what i want, and you just have to deal with it. Now go back to your side! And leave me... and my pet, alone”
Samey looked down at you one more time under her foot. She then closed her eyes, gulped her throat and looked at her sister. Determination in her eyes “Amy, I'm your sister. Which means I've been with you all my life, I’m use to it. I knows you. But i also know things about you that no one else knows. Embarrassing things. Disgusting things. Things... that will fucking ruin you”
Amy’s eyes go wide, not only at the point her sister was making but the language too “If you hurt him, or if you attack him. Lets just say little miss popular will go to little miss laughing stock. What do you say?”
Amy was fuming, was she getting blackmailed! By Samy! She wanted to put her sister in her place... but she can't risk it. At school she's the loved twin and Samy’s the loser, but if Samey starts talking that could all go away.
“Fine” Amy said angrily, raising her foot off of you. Letting you get picked up by Samey “We can share him okay?”
“Okay” Samey said, giving her sister that much.
What happens next?