Mary felt the effect of the liquid nearly immediately. She felt warm all over, and rounder. Oh no! Mary thought desperately as she felt her just fat body pork up into an obese one. Fat swelled up everywhere, rounding off all her edges and curves. Mary was quickly becoming a very fat pig, and giving a good impression of a ball with legs.
The weight was soon too much for Mary and she plopped down onto her stomach, but still continued to swell with fat.
Jess had been watching from the top of the couch and was taken aback at the sudden fatting of Mary. She hadn't been expecting that change to happen. But a welcome change it was. Jess easily hopped down from the couch and padded over to the gigantic, but immobile Mary. She nosed her fat friend, marveling at this wondrous gift of revenge.
Mary was oinking and grunting in fury, she was helpless and felt the cold nose of doom on her.