He does chuckle, the equivalent of an exhale through his nose, a knowing and close-lipped smile as he lowers his head in acknowledgment. No doubt he'll find someone to occupy himself with later, a willing and warm body to pour himself into and perhaps even feed from, but he doesn't feel the compulsion to drain anymore, to take more than what he needs to sustain himself — only small amounts here and there, enough to satisfy the power of the ancients within him.

"What are the odds of said arrival being the newest addition to our ranks?"

Lestat wouldn't have hesitated to ask Louis the same, if given the opportunity, but he's come upon Armand first, and therefore, he sees little problem with taking advantage of the older vampire's... settled mood.

There's no veiled threat behind the question, nothing that points to a desire to purposefully agitate; he's simply curious about what would have convinced either or both of them to make another vampire, especially given what he already knows about Armand's reluctance above all.