Mary stepped over and gently cupped one of Jess's breasts in her hand. She leaned forward and put her mouth over a nipple. Mary breathed in through her nose and blew out steadily. Jess felt a sudden shiver run through her body. She could actually feel the air enter her breast and feel the pressure swell it. Mary stopped to survey her handiwork. Jess's breast has ballooned to twice it's original size.
Jess looked down, amazed, and tentatively worked her bigger breasts. She smiled as she felt a sense of pleasure from the full breast. Looking over at Mary she grinned. "OK, I believe you now. But, I'm a bit lopsided, could you...?"
Mary grinned back and nodded before taking a big breath and blowing up Jess's other breasts. Jess's other breast soon surpassed the first one. Mary winked at her growing friend. "Oops, better make the other one even."
Jess moaned and massaged her ever growing breasts as Mary keep blowing them up slowly. They grew passed volleyball size, the basketball size. Finally, Mary pulled back, lightheaded to see her friend with large, round breasts with a diameter of twenty-four inches. As Jess rubbed her balloon breasts, they made squeaking sounds. Mary patted one, hearing a hollow, empty sound.
"Well Jess, you got bigger breasts now. Though, they're more balloons than breast." Mary giggled. Jess nodded, a bit distracted by her change.
Mary was feeling restless, she wanted another change, either in her or in Jess. She looked around for an idea...