The Originals X Katherine Pierce

After five hundred years running away from Klaus and using and manipulating people Katherine had finally settled down with the man of her dreams the only man she was truly in love with. The half brother of Klaus; the most handsome original, THE one, and only Elijah Mikaelson. They have both been in love with each other since their encounter in 1492. They lost each other for a while but I think they both found a home in each other. But there is a problem... Klaus doesn't accept his newfound relationship with his dear Katerina. He will stop at nothing to get revenge on Katerina. Elijah invites her to New Orleans to show Klaus that he wants and deserves to be happy. Happy with Katerina.
There are other problems Klaus has to deal with first like getting New Orleans back from his adopted son that he thought was dead and raising his child.
Will he really have time for Katerina or will that totally slip his mind and will he finally get over his grudge against her?