The creators and writers would say she was just happy he really didnt disappear, but to the free-bird minds of the wiki's fanon writers, its the former. One radical idea I came up with is the writers found the fanfiction online and tried to subtly pander to them. Probably not right, but neither could any of them. As far as I know, there is no right answer.
I've heard TONS of people say that Oona hugged Gobes as an act of love. Personally, I was shocked when I first saw Oona hug him. Being a fangirl of OonaXNonny and GobyXDeema, I hope that Oona doesn't fall for Goby.