After you dim the lights, you have to rub her shoulders more. After you get the bar past 50% this way, click on her jacket at the front, around her breasts, and she should take the jacket off.
You just left click the tip over the feather over her upper arm and move it like you've been doing everything else. She'll laugh, and when you release the mouse button, she'll brush at where you tickled her and part of her bra will drop. Repeat the process on both arms, then on her stomach. Voila! BOOBS!