https://www.amazon.com/dp/B09XVJRBYV
Mandy has a crush on her boss, and she believes the feeling is reciprocal. But when he hires a busty, younger, bubbly new assistant, Mandy feels that her hopes of becoming more than just an employee are dashed. Heartbroken, she goes to lunch by herself and happens upon a strange curio shop. Inside, she finds the answer to her problems, a way to grow her attraction, and make her boss notice her. But, when the spell goes out of control, everything about Mandy grows. How will everyone respond to her new and improved, and above all else bigger than life persona?
This is a giantess story with no excessive violence or cruelty. It features hourglass expansion.