To be very honest, I don't think that this jealously will stem from romantic feelings as it may from Colleen's desire to help find the art pieces. Victoria could be stealing Colleen's glory by working closely with the proffesor. Also, while Colleen may be upset with JT for getting information on Proffesor Korbel, how many bets that he has a shady past therefore impacting Colleen's safety? Besides, is this source really reliable? I'm curious.
-Andrea