Poor Amadeus probably should have minded a lot more than he did. But he would easily heal and clothes were easily replaceable. And it wasn't the first time they had bloodied the sheets and it wouldn't be the last. There was a reason only black sheets were used on bed anymore. One didn't have to worry but about bloodstains then.
That growl caused Amadeus' lips to curl upward against his lover's even has he himself gasped and moaned over the feel of those claws cutting into his skin as Ariel gave himself over to his orgasm. Even in that he had to smile because look at how very far they had come since that first time. The Tremere nipped and bit at the Gangrel's lips in return before returning to kissing him, more than happy for Ariel to remain where he was.