I think it is Hook too. I see it in front of me. With the lost of Henry and searching for him, makes Regina (and Emma)emotional. Probally Hook going to comfort her in a way. And she probally going to have feelings for him, but because she can’t really trust him, she doubts if she wants to give her self to him.
In this article there is said that Hook will be a part of a new love triangle with Regina and Emma. http://www.examiner.com/article/once-upon-a-time-season-3-spoilers-love-and-more-changes-teased
That article seems like the author misread a lot of things A&E have said in other interviews. Rufio would NOT be an actual character, they’ve said. I’m still doubtful they’ve teased an actual love triangle as they have avoided saying whether anything romantic would happen aboard the JR. A&E joked about a rhombus, but the article doesn’t say a direct quote but that “previous spoilers” about a Regina/Emma/Hook triangle. What spoilers were those? Is it like they read some other interview with speculation then classified it as a spoiler?
“If I had a world of my own, everything would be nonsense. Nothing would be what it is, because everything would be what it isn't. And contrary wise, what is, it wouldn't be. And what it wouldn't be, it would. You see?” -- Lewis Carroll, Alice's Adventures in Wonderland & Through the Looking-Glass