Istredd is getting anxious when he thinks he maybe misspoke, so he relaxes at Lucifer's wave off. He generally believes he would tell him the truth, so it was probably him getting into his head too much. As per usual. He isn't that good at having friends either, even if he's found it very rewarding so far.

"You're welcome in general, really." He smiles faintly along with a slightly teasing tone. "I ... like having someone count on me. It's new."