Mattie felt only half-aware of being picked up by Nick, but her foggy perception appreciated it because she wouldn't have to attempt to walk anywhere herself. He said something to her that she heard, but that didn't quite sink into her head. Part of her was replaying earlier, with him at the door, the yelling, the old neighbor's alarm. 

It felt good to be on the couch and off her feet. She put her hands on Nick's chest and leaned on him again.