User blog comment:James12708/Possibility of a Mass Effect 4/@comment-3046679-20120922070216/@comment-24174486-20121023185628

Well, she kinda helped bring Shepard back to life...

I wouldn't call the rescue on Therum being "used" in any way. Shepard needed to find Liara and she had no idea that anyone would come for her. (Especially if you hold off on finding her. XD)