A feather had sprouted from Mary's wrist. Odd that she didn't feel a thing, she suddenly feel a bit itchy as her skin gets all bumpy like she were chilled. Her hand and her arm becomes covered in white feathers as does her other arm.
"Gah!!" She yells as she's quickly engulfed in feathers, her lips feeling hard and soon solidifying into a beak. Her legs become scaly-ish and her feet reshape into talon-like claws. She begins to cluck in surprise as she begins to look like a chicken! Her belly and rear plump and bulge, thighs becoming thick as well. She removes her clothes as quickly as she can manage, before they become a tight fit.
Mary swells larger and realizes she's a big fat hen! Almost as soon as she realizes this, she feels a rumbling inside her...