It took several tries for Mary to even lift her arm from the tile floor, to try to guide the human vial to John's mouth. Not only were both of their bodies rocking from the intensity of the continuing coupling, and not only was it hard for her to focus through the sensations emanating from her pussy as it was so thoroughly fucked, but John's gaping jaws were behind and above her own head in an awkward position.
"John, John, just let me ...!" she tried to implore him to let her guide the vial to his mouth, but he either didn't understand or didn't want to cooperate.
Mary lowered her arm and the vial back to the floor, afraid it might get broken, if he struggled, and just then felt him tightening, then her own pussy tightening, his body growing rigid, and a hot sensation of his lion seed flooding her half-lioness pussy.
He came in her several times through the night, and everytime it somehow felt better to her. She supposed it was her animal instinct to be mated ....
It was only as John finally slowed down, and withdrew from her, and she felt his massive ejaculate running down between her back legs, that she realized something was wrong.
She tried to pick up the human vial, and found she couldn't close her paw around it ... or rather, she realized it truly was a paw, and not a hand resembling a paw!
She turned her head and saw her reflection in the glass of the nearby oven door, and saw a full-fledge lioness staring back at her.
Fuck! she realized: she must have absorbed more of the lion potion from John's cum! How are they going to take the human vial to change back without hands ...?