It was a long time ago. Everyone was different. Back then,Bella was not married and was not a vamp. She didn`t know how strong her feelings were(although she kind of knew,after New Moon) but she was confused. Plus,if i know that Jake has imprinted on me and was mine for life,i woldn`t have any problems,cause imprinting is a very..devotional process. So i wouldn`t care that much,i guess.