Page Six reports that the "Mean" songstress, 22, flew the soon-to-be high school senior, 18, on her private jet from the Hyannis Port, Mass. Kennedy family compound to her hometown of Nashville because she "missed Conor so much" -- even though the pair had only been separated for a little over a week.
"He's been with her ever since, and his family doesn't know when he'll be back," the source explained to Page Six of the brand new couple, who have only been dating since July. "Things have become so serious between them so fast that no one in Hyannis Port would be surprised if they eloped."
A rep for the pop star couldn't be reached for comment about the claims surrounding Kennedy's luxe flight.
Sources close to Swift tell Us Weekly that she's already fallen hard for Kennedy, despite their extremely brief courtship. "She's head over heels," one insider told Us recently of the crooner. "[Conor's] a smart, sensitive guy."
The fact that he's a member of such a storied All-American clan doesn't hurt, either.
"She says it's a fantasy come true," the source adds of the Grammy winner, whom insiders say has been labeled a "Kennedy groupie" by Conor's cousin, Ted Kennedy Jr. "[Taylor] is very smitten."