Well... nothing at first... but...

Lisa takes a deep breath. "Well... that sounds weird. Kind of makes me feel a little strange. Doesn't you? Sounds so old!" She sounds a little short of breath.

You are about to respond, but then you notice a red flush in her cheeks that matches her hair as she continues to breath in and out. Her buxom chest captures your chest with each of her heaving breaths.

You notice a little confusion in her expression as if she is not feeling quite herself. "Pardon me, John. But did it suddenly get hot in here or is it just me?" she asks with a weak voice as a bead of sweat trickled down her forehead

"Umm. I'm... not sure," you reply, confused yourself... although a bit intrigued as well. You look back at her heaving chest and it almost looks like her breasts are getting larger. With every breath, they seem to stretch a little bit more on her sweater than before. While perhaps no larger than a B-cup before, they seem now to be swelling, stretching at the fabric to a C and beyond

With you looking in awe at her massively expanding chest, Lisa realizes and looks down at it herself. In amazement, she watches as her expanding boobs keep stretching and stretching the tight sweater. The collar begins ripping down the middle as the fabric tries hopelessly to hold on. It rips down the middle, showing mountains of cleavage barely contained by a red satin bra.

Her deep breaths become moans as she suddenly reaches up to feel her bulging mammaries. She lets out a deep groan as she explores all over her chest which must be a D-cup by now. "Ohhhh... John.... I don't know what is happening to me," she whimpers.