The sight of his daughter's intense writhing along with the sounds of her pleasure served to enhance his own pleasure as Jacob mated his eldest.  Jacob could hardly believe how tightly Katharine's pussy clamped down on his length, each thrust causing the building sensations of ecstasy to layer upon itself over and over again.  Normally his endurance fared much better than this, but he had fantasized about this opportunity to be so intimate with his little girl that it compromised his longevity.  Still, he did all he could to keep his slowly building climax contained behind a wall of his will.<br/><br/>He made no effort to hide how much he was enjoying this and didn't need to exaggerate it.  Jacobs virile moans and heavy breathing were entirely genuine while his eyes clearly shown his affection for Katharine.  The tears in her eyes were instantly recognized as ones of happiness and love and he couldn't help but smile lovingly in response.  "Oh, my Katharine."  Leaning forward he placed another passionate kiss upon is daughter's lips, allowing his tongue to writhe sensually against hers for several moments as he continued to thrust in and out of her.  Only when he felt the telltale signs of her escalating pleasure did he break the kiss.<em>"I'm close Daddy... I'm so.. close."</em><br/><br/>Those words became a source of immense pleasure in of themselves causing his already strained will to begin to crumble.  He would not be able to put off his own release for much longer either.  "So am I sweetheart...  Is it alright if I finish inside of you, princess?"  Jacob wouldn't have to worry about impregnating his daughter; it was common knowledge that he had gotten a vasectomy shortly after Maria's birth.  As he waited for Katharine to answer, he felt his own body begin to tense as his own climax quickly approached.