First Time online sissy

I'm usually the dominant type. Yesterday I was chatting with a sissy. And I don't know how she did it, but she turned the tables. After a few minutes, I was lying in my girlfriend's thong with a toy up my ass, calling myself Sissy Bonnie and sending her pictures. I don't know why, but it turned me on incredibly. Now I can't think of anything but being her sissy again. She got me talking about how I'd love to be everyone's plaything at a party, what I'd like to wear, and how I could satisfy men. Is this how I'm going to become a sissy?