Stella's one and only litter mate

Since Stella has gotten comfortable navigating the entire house, there are times that we 'misplace' her, or cant find her. We look HIGH and LOW only to find her under our bed snuggling with this... My slipper! Now, everytime we cant find her, we just look under the bed for the slipper, and she is found curled up with the leopard print slippers. I wonder if she thinks they are her litter mates???

Can you tell the difference between Stella and the slipper?