Slave for Eternity

When a slave tells Mistress Lexi and Jenni they are too sadistic to serve, they just laugh that it could be much worse. So they decide to take away his option to leave and show him how good he had it. First Lexi, then Jenni, bite the slave, then make him drink from them. The poor slave has now become a vampire, helpless to do anything but what his makers want.