More rabbit then she expected. She was still human sized, but covered in fur with a mostly rabbit face & ears. Mary turned around and saw a little powder puff tail. Staring in amazement, she studied herself, she liked what she saw, and realized there seemed to be no ill effects, (aside from being partially a rabbit).
Since there seemed to be no side effects, "A little was good, a lot should be better", she thought. Mary went back to the vials and found it already a bit hard to hold them. She decided to pour the restoration vial into a bowl, so she could drink it easily if need be, then she grabbed the rest of the rabbit vial and "bottoms up" she drank it down.
The changes started faster than before, maybe do to drinking a relatively large amount, turning to the mirror, she saw her face completely change, eyes moved further apart, ears got larger, and before she know it, the perfect face of a white rabbits stared her back. Her arms shortened and her back arched, to where she could no longer stand on 2 feet. Mary's body started to pudge and fluff up, she could no longer see the mirror, but looked down and saw a rabbit, just then the room started getting bigger, she jumped onto the bed before she was too small to do so. Mary looked at Tigger, who was staring with big eyes, looking at this very unusual thing happening before him. He was getting bigger also, but obviously, Mary realized, she was the one getting smaller, the last step in becoming a rabbit.
The room stopped getting bigger and after a moment, Mary looked at herself again, she was a rabbit. She still had all her memories, but she was also feeling the effects of being a rabbit, and was feeling very horny. She found she was much more flexible and that she could lick pretty much anywhere... That felt very good, but she then felt something moving on the bed, as Mary looked up, Tigger was moving in on her, maybe aroused from the scent Mary was giving off. She tried to "walk" away, but found the new body a bit hard to get used to, before she knew it, Tigger jumped on top of her and held her down. Mary's human side didn't want Tiggers advances, but at the same time, she was still felling quite horny and the rabbit side was hard to ignore... Tigger was trying to mount, and Mary could no longer resist, she found herself giving in and presenting herself to Tigger, he didn't need any more than that an found his target, and started furiously pumping away. Mary was a smaller rabbit and Tigger was rather large, but she was in ecstasy, waves of pleasure washing over her. She knew this wasn't right, but she could do nothing to stop, she felt herself build to orgasm, and when it came, it rocked her, and Mary almost passed out...