Sissy tied to a bondage bench, pegged, and fed his own cum

Mistress ties me hard, prone to a bondage bench, then stretches me with an inflatable buttplug. She adds a powerful vibrator to keep me aroused, then pegs me with the biggest cock she has and pumps me full. When she's done with me, she lets me cum, but only if I drink it down. This is the only way I get to cum nowadays.