You know, August somehow figured out Neal was Baelfire, although they never explained HOW. That's a big thing to know.

So it's possible Tamara found out, too, somehow, and targeted Neal specifically to get to his father through him.

It would be lame if she tries for the dagger right after Cora's attempt, but if there is one place you could go to get "magic in Storybrooke" (since it's not the well), it's the dagger.