Ysabeau: Matthew's true love will always be Blanca; she gave him a son. You'll never be able to bear a child by him. In 1500 years, Matthew has never mated, and I didn't think he ever will. It's forever.
Diana: I will never leave him.
Ysabeau: Of course you will. Your life is fleeting compared with a vampire's. When you are long gone, Matthew will have to carry on living without you, just as he did with Blanca.