Emma's been tied up, with a powerful vibrator in place, under UV lights, for quite a while now. I've been monitoring her to make sure she doesn't cum without permission, but I'm not going to make it easy for her when I do finally let her cum. Emma has always hated the cane, but it's not long before she's begging me to hit her harder so that she can cum over and over again, before I leave her once again, struggling in the dark.