Max didn't need the whole story to know that didn't end well. or maybe it ended all right, but there was a lot of trauma and drama involved. He knew things like that were never easy. Noah might not have been a shape shifter, but he had in a sense kidnapped Isobel, the way he used her body and mind.
"I'm sorry that happened to you." He wasn't sure what he was supposed to say. He cared about her because she was Liz, but she wasn't his Liz. It was an awkward, complicated thing.