Mistress Sidonia is training the ass of her slave, she is gentle but firm as she puts on her rubber gloves and starts the stretching with her fingers, lubing him up and caressing his prostate gland, making the cock throb with hardness. Mistress then takes him with her big 9inch strapon, probing his hole slowly at first and when he starts begging for it deeper, she thrusts hard and relentlessly.