Obi-Wan finally going on the offensive himself wasn't really surprising, now that another person was involved. Anakin was indeed pushed back somewhat, but that didn't change much about his intention to end the Jedi Master.

"All of this is the Jedi's fault." he said, stubbornly.

"And that's why he will die!"

That and, of course, he still had orders to kill the Jedi.

A mechanical finger was pointed in Grace's direction before Anakin's glare settled on her "Unless you want to die as well, leave!"