Tyler and Caroline have been apart for a some time now, while Tyler tries to overcome his sire bond with Klaus. Meanwhile, Klaus has been courting Caroline to no avail. Candice Accola spoils that the strong willed barbi-vamp has her own agenda, but ultimately could go either way if the gesture was grand enough.
“Caroline is really just using Klaus to relinquish Tyler. She’s playing the game a little bit so that maybe he’ll do that for her out of love. It would take a lot for Klaus to be welcomed into Caroline's heart. The ultimate thing would be for him to release Tyler from his sire bond."
Source: Hollywood Life