Tyler didn't respond as he took the bottle of water, Danielle was right. He needn't use words, it was written on his face, the guilt was setting in as the alcohol left his system. 
Either unable to find words or just not ready to speak he instead just tilts his head back so she can easily get to his injuries. 

"Thank you" he whispers after a while, sitting as still and patient as possible while she dabs a wet cloth on his wounds. As she steps back to asses her work Tyler turns his head to catch her eyes, he looks at her for a moment, his lips slowly waver but no sounds come out. He had decided against what ever he was going to say and takes a sip from his water before turning his head to the side so Danielle could continue.