I can imagine at some point Matt would come to her after having already lost too much blood, and try to talk her into feeding on him anyway.
"No, really I'm okay. It wasn't that much blood."
"If you could see how pale you are you wouldn't be saying...Ah, who am I kidding? You would insist on endangering yourself no matter what. Whatever. I'm not feeding on you, now drink your damn water."
OTOH, maybe this would cause Matt to be more careful in fights. He would feel really guilty if his recklessness kept Claire from feeding.
Re: Claire/Matt, Claire is a vampire, Matt is her donor
"No, really I'm okay. It wasn't that much blood."
"If you could see how pale you are you wouldn't be saying...Ah, who am I kidding? You would insist on endangering yourself no matter what. Whatever. I'm not feeding on you, now drink your damn water."
OTOH, maybe this would cause Matt to be more careful in fights. He would feel really guilty if his recklessness kept Claire from feeding.