Master is not feeling merciful...

You hold your breath and bear down against the pressure of his dick against your tight hole. The **** continues to build. Your pussy lips spread and the muscles at your opening strain. The wrist restraints attached to you on either side clatter as you pull and fight. You attempt to shift forward to relieve the pressure and feel your trapped nipples pull painfully in the clamped hands of the statues on Master's desk. Tears fall from the corner of your eyes and the room begins to spin.

And then... Master speaks.

"DO YOU NOT UNDERSTAND YOUR PURPOSE, GIRL?" Master growls from behind you

"Uuaack!" you gasp as the pressure on your poor little pussy increases.

"ANSWER ME!"

"Yes, Master!" you cry as the pain between your stretched lower lips increases, "I exist to ser- ser- serve you!"

"CORRECT. THE ONLY REASON YOU EXIST IS TO BE BRED BY YOUR MASTER... WHAT WORTH IS SOMETHING THAT CANNOT SERVE ITS FUNCTION? WOULD YOU EXPECT ANYONE TO KEEP YOU WITHOUT SERVING YOUR FUNCTION!?!" He asks incredulously.

"No! Please take pity on this ****, my Master! I'm... I'm frightened!"

This elicits a surprised cough from Master, "YOU ARE RIGHT TO BE AFRAID... BUT YOU ARE ALSO DUTY BOUND. DO YOU UNDERSTAND?"

You nod your head in frantic understanding. You have upset him deeply. You know that you next words will be critical for you to keep your position. They might even impact your very survival within the harem! But you really want to know why you have to endure this tightening augment.