"Hey, sis...watch out for the hmmpph..."  You begin to call out, until the shadow of her foot comes down on you as she looks around.  You can smell her heavy foot pressed firmly down upon you and feel that somehow this potion has completely changed the physical composition of your body.  Your sister's foot smells quite sweaty as it rubs your body into the fluids.  Then you finally get released from the floor, albeit a temporary release as you get shook around violently.

"Yuck!  Foxy must've spilled something down here and now my sock is all wet."  You hear her loud voice far above as she tries to shake her foot dry.  She then lets out a sigh and starts walking up stairs with you being squished between the floor and her wet, sweaty smelling sock at every giant stride.