The objective is clear: until the slave manages to take a whole hand anally and allow himself to be fisted, he will receive nothing but ruined orgasms as an incentive.
With his balls tied up and his cock locked away, the slave kneels between his Mistresses, Miss Kirsch and Lady Claire. He presents his hole, defenceless, and surrenders to his fate.
The mistresses first give his back door a thorough massage with their fingers before reaching for large dildos and training him with them to their hearts content.
The training is progressing well, so that by the end Miss Kirsch almost manages to slide her hand into his dilated slave hole. He is probably not far from orgasm.
