You've been caught by Wonder Woman, and wrapped in her lasso of truth. She wants to know why you've been snooping around, and you tell her the truth. You wanted to be shown how to be a woman and taught womanly ways by a group of females such as the amazonians you heard of.
Intrigued, she finds out what feminizing is as helps you get into the outfit you had stowed away in the bag, and encourages you to be feminine and dressed in lingerie. After all, women are supreme and far superior. With sensual guidance, she has you confessing and opening up like the sissy you were made to be.