Have mega boobs and talk to Fawn[Shared unit?] and Marin[Pixie's Mannor] and they'll alter clothing you already have
Fawn - T-shirts and Bras
Marin - The 3 Party dresses and the Maid and Waitress uniform
(She has Hoodies, Windbreakers & the No Pants Shirt and Slut Shirt, but she'll refuse to alter them, For now?)