He's cocked his head and narrowed his eyes as he listens to Lucy's dithering, finally cutting her off with another chuckle.

"Oh! You want to move in together! How sweet. Let's renew our vows while we're at it, hmmm?"

The Master rises to his feet and creeps toward her. "Remind me again-- what were they? 'Til Death Do Us Part'? Whose death will it be this time, I wonder?"