Perhaps she will be a double-double agent? Hm. Although I do agree with the other posters, enough of the betrayal angle.
While not a fan of Mockingbird from the comics, I did like how she was portrayed on Agents of Shield.
Although the whole "romance" dynamic turns my stomach; do we REALLY need more of that? Oy.
Griping points aside, it does have me curious and I am interested. Hope she does remain on the show.