I've added my own strap-on cock to this session with my trapped slave so that I can painfully and repeatedly beat his erection with my own silicon version. Of course I've turned up the frustration by letting his cock get so near and yet so far from his Mistress's lips. When he loses control I wipe his own man-filth across his body and then allow him to breathe the scent of my body through the hoses controlling his every breath.