Only the first one's semi-free. Nothing personal, just good business.

[Not that it's really been about business since Shepard and his damn suicide mission became a standard part of her life. But seeing as she'd survived certain death so far, it didn't hurt to keep options open. Even if Omega wouldn't have been her first, second, or fiftieth choice on where to get that going again.]

And I guarantee the first one's still worth the strings attached.