"The Beorin aren't going to learn anything about us that they didn't while we were in their custody. She doesn't know much of anything about us, anyway."
"Just because she can shapeshift doesn't mean we won't see if her ship follows us. We just leave her in there, make sure she can't do anything immediately, and leave."
"Even if I could, we could be reported just as easily after I summoned it as before. Maybe we could find a way to disable her ship or communications so we could get far enough away for that not to be a risk?"