Another half an hour

Deciding that you would savor this one's transformation, you slow your fucking down to a steady rhythm. Licking her tits with your tongue makes her moan again, planting your tongue down her throat as you kiss her spreads more of the virus.

As you feel her get more and more tired from all the mini climaxes shes had, you decide that now is the time. Lifting her up, you regain your speed, which in turn causes Kate to start to bounce on your two cocks even more. Eventually, you feel the pressure build in your balls until you can't hold it any more, releasing your demon seed triggers Kate's transformation. "Thank you my massster." She says as her transformation completes