Otto During knew that, a this time of crisis, he could not keep the knowledge of the phone guy's missives and body language from the interview from the German authorities. Also, the moment he called Saul he also knew that either Saul would call in the troops, or that the German BND was bugging Otto (and/or Saul) and they would send in the troops. Either way, Otto avoids as serious problem with the Govt and has saved face with the staff - Saul said he would honor the agreement and allow phone guys counsel to accompany him, but Otto assumed otherwise. And probably Jonas knew all this as well.
Laura can't be that dumb to assume she was safe legally.