Their libido thirty times stronger they try to go away of each other but the need of sex is too strong and after another minute of fighting their urge, they finally give in.
After five minutes their libido are eight times stronger than before. Way beyond human conception. And they fuck like rabits.
Because Sarah doesn't have put a limit on the curse, they finally dies of exhaustion after four hours of crazy fucking. But at that time, their mind had already melted into a way beyond normal lust.
Sarah is now free of all movement... well if Jon's granfather is really dead and his mother don't find strange to find two dead bodies in Jon's bedroom after the visit of Sarah.
