That's right- entertainment! After all, if I'm going to be a firm, but tolerant mistress and let you masturbate for me, then at the very least I deserve to be entertained.
So you will do your best to get me horny during this little session, and from reading all your nasty little thoughts and comments. I know, I know, I highly doubt that watching you (or imagining you) little sissy girls wacking off will get me wet, but we can try can't we? *Giggle*
So, I will make you earn your little cummies. I will make you prove that you are a worthy sissy and a worthy slave, that you aren't just wasting my time. You will obey my commands, without question, and I will watch you squirm while you try to avoid the shame of jacking off in front of a powerful woman.
I wish you luck.