Let them both win - just cum now.

To Hell with it. You feel your climax approaching, and after all, you made up this rule - it's yours to break. You beckon Coblaith over. "Resume your duties together, slaves! Make me cum."

As Coblaith leans in faithfully and begins to suckle your balls, you feel the storm coming on you. You let them work for a few moments, then seize them both by the hair and pull them back. "Mouths open, eyes on me!" you bark. The slaves obey, sticking out their tongues obediently, as your climax comes and you spurt between them, your seed flying into the air and landing on their subservient faces, tongues, and bodies. Once you're done, you sigh in pleasure. "Well done, slaves. I declare this contest...a draw. Clean each other up, but don't use your hands."

After a moment's hesitation, Betua understands your intention, and the slaves begin to kiss and lick each other as you get yourself a cup of wine to relax. You turn back and enjoy the sight: Betua licking up one Coblaith's large breasts to her face, then holding still while Coblaith returns the favor, swirling her tongue around Betua's nipple to ensure it's clean. You smirk.

"You both did well tonight, slaves. I'm home now for good now - or at least for some time. And I intend to use my time here to the fullest. I'm glad we all understand where we are in the great order of things." Your slaves bow their heads obediently. "Leave me now. I need my rest. Dismissed, slaves. I may yet use you again tomorrow."

Your slaves depart at an obedient trot as you, at last, climb into your own bed.