Some ideas to feminize the character that would be very cute:

• Bra
• Dresses
• Painted nails
• Lingerie overall

This would give new personalization and something to spend money on

Agree. And give more humiliation ideas from Jeff and Zoe.

Ngl I would go a step further and Add the idea of Taking the Feminization Public. Like at a high enough level the MC is in Feminine Clothing  at Restaurants, work, and even a Wedding dress for their own wedding. 

Might he alot but just an idea to pitch in. Clothing would be like 

Thongs, Yoga Pants, Form Fitting Shirts, Dresses, Blouses, tight Jeans, skirts, shoes, hair, wedding dress. Ect...