He can take almost all of the endearments, but that one always sends him flushing brilliantly, something the hologram unfortunately auto-translates onto his new face. "I- uh. I'm already going back home with an illicit AI and questionably legal wetware." The grin that comes with that is genuine, because that's just the state of things, and a little extra knowledge that no one has a reason to suspect him of knowing is a drop in the ocean at that point. He leans just enough to put a hand on Cortana's knee, smile positively saccharine once he's had a second to recover himself. "I don't think either of you sweethearts need to worry about me."