A curious bisexual submissive, eager to please their femdom Mistress, receives an intensive lesson in cock-sucking like a pornstar pro. The Mistress, experienced in bi-threesome dynamics, watches as the sub eagerly takes in her commands, wrapping their lips around a thick, veiny dildo, then a real cock, learning the art of deep-throating and gagging. The sub's humiliation grows as they're forced to compare their skills to those of a pornstar on screen, but their arousal can't be denied.