He growled the word again, this time ending it with several syllables that added that the endearment was forever and turned the end growl into a purr.

But she was holding back. Too soon, perhaps? They'd only just re-found each other, maybe he had gone too far. He was never one for knowing boundaries or tact.

He said something he thought she might remember. The Gallifreyan equivalent of "I want you", purred against her ear.