So your legs are silky smooth and you might happen to have a shimmering pink bracelet that reminds you that you should be feminine whenever you can. Maybe you've gone out in public very self-conscious that other people will see the shimmer of your painted nails. Maybe you've worried that a coworker would notice your panty lines or bra straps under your shirt.
Or you might be trying to keep your sissy side a secret. And only your neighbors know - staring at you through your bedroom window each time you decide to transform yourself into your beautiful inner sissy. You might even have a secret admirer who doesn't even know your name - only your beautiful feminized form in the window across the street.
Or maybe you've been a very secretive sissy - hoarding your femininity all to yourself :D