Jess snorts again, she becomes a little scared now that the changes are actually happening.
Mary watches as Jess's nose swells. The nostrils flaring and rounding out. Her nose pushes outward into a snout. Jess's ears flatten and move up onto the top of her head and flop down a little. The most evident sign of change was the Jess was gaining weight! Not a little, but a lot. Fold of fat swelled and pushed against Jess's clothing, straining the fabric. Jess suddenly stands up, knocking the chair down, as if she had sat on a pin. She turns around, looking down at her but, and sees a little curly tail poke through her pants.
Mary grins at Jess, as the changes cease. Jess is now an obese girl with a pig snout, tail and ears. "Aw...you look cute, Jess!" Mary says and hugs her fat friend.