Doug was indeed in a dilemma. Having just removed the clothespins from slave louise's nipples and tonguing those sensitive nubs back to life, and after doing the same to her pussy lips, he figured he'd allow his lady one last pleasure before Liz returned.
Hearing the long haired siren come during her spanking pleased him, for giving his lady rapturous enjoyment was his ultimate goal. So while he had his head between her thighs, he found her clit and began tonguing it, hoping to bring her off again.
Louise's breathing escalated, when Doug heard the key enter the lock on the dungeon door. A bit of levity and concern entered his brain. What if at that moment the real estate lady were to walk in, with him having his face firmly pressed into his lady's twat? Should he continue licking?
At that traumatic moment the shirtless man just realized something else. HE DIDN'T HAVE THE FUCKING KEY TO THE PADLOCK!
Immediately he got to his feet, his face smeared with pussy juice, while he heard the doorknob turn. Seconds later Doug heard the door shut, and the man who longed for Liz's return in the hope of turning her into another one of his slaves, gaped at what he saw.