Punishment Buck - Strapon Fuck & Ass Spanked

My chaste sub is tied tightly to the punishment box, ass stretched up and completely at the mercy of him - I take his tight ass, push my thick strapon deep into him and fuck him hard and rhythmically, while at the same time I hit his ass hard with both hands until he glows really red - with each thrust, my hands clap on his flesh, I alternate between deep hard fucks and intense blows, enjoying his moans and trembling and making it clear to him who is in total control.