Padded shower cell

While I was taking a shower yesterday, Sarah whipped open the curtain to talk to me, thus letting in cold air and letting out water.  I explained (again) that the shower curtain is not soundproof and does not need to be opened for me to hear her.  That gave me an idea, and I spent the rest of my shower fantasizing about the perfect shower barrier.  It would be controlled by a button inside the shower that would put up an opaque soundproof, waterproof, childproof wall.