"Neil said nothing. Andrew hooked his fingers in the collar o..." — Nora Sakavic quote meaning

Neil said nothing. Andrew hooked his fingers in the collar of Neil's shirt and tugged just enough for Neil to feel it. "I know what I'm doing. I knew what I was agreeing to when I took Kevin's side. I knew what it could cost us and how far I'd have to go. Understand? You aren't going anywhere. You're staying here." Andrew didn't let go until Neil nodded, and then he reached for Neil's hand. He took his cigarette back, put it between his lips, and pressed a warm key into Neil's empty palm. Neil lifted his hand to look at it. The hardware logo engraved in it meant it was a copy. To what, Neil didn't know, but it only took him a moment to figure it out. Andrew used this key to unlock the front door and then took it off the ring on the porch. Now he was giving it to Neil. "Get some sleep," Andrew said. "We're going home tomorrow. We'll figure this out then." Andrew went around Neil to the front door. He had no sympathy or comfort for his family as they grieved Seth's unexpected death, but he would keep watch on them from the doorway until they were okay again. It was harder than it should have been for Neil to look away from him, but he finally set off down the hall.