Sentence:  Princess Sonja, the daughter of an Oslo fashion house director, married Crown Prince Harald last summer after a <WSD>will-they-won&#39;t-they</WSD> romance that had gone on for a decade. 
Meaning of the word marked with <WSD> tags:  Of or pertaining to a potential coupling between two people who share romantic chemistry, but whose relationship is threatened by uncertainty, external obstacles or internal strife.