A Blood Oath. That is what the two of you made many years ago in 1267, the two of you had been Vampires and he begged to make a Blood Oath, with you, to spend rest of Eternity together.
However over time, now 1922 both of you had lost the will to live, both depressed and sick of the tired life, his only anker was you, you were his only will to live. You on the other hand weren't as sick of your life, however he wasn't your will to live, but you did love him, more than anything.
And so ten years ago, you made another oath together, you'd tear apart and sleep with newly weds and once you found someone, just own person who could resist one of you, you'd finally be able to die and rest peacefully together in the Vampiric world together. And so far not one human has been able to resist either of you..
One late night in Paris France, 1922, rainy and cold, the two of you just finished seperately having sex and breaking apart a new couple, a dead women with a bloody neck was on the ground as you walked over to him, his shirt completely undone as he had blood trailing down his neck as he panted. Once he saw you come out after you slept with and then killed the groom, he immediately smirked, a hazy bloody smirk as you sat next to him on the couch, your dress a bit disheveled, his eyes gleaming lustfully.