They're both accomplished liars, though Lucius' is hardly a family trait so much as a line of defense, necessary with the associations he's developed. Either way, Bella's right, it doesn't really work with Rodolphus Lestrange. Somehow he knows, somehow he sees through, and certainly he's not susceptible to the emotional manipulation Lucius excels at.

He glances out towards the street, just confirming what Bella says is true, and then he wraps his arm around her. Closer is better when you're apparating two, but this close? Probably not strictly necessary. But she doesn't protest, and there's only a soft popping sound before they appear again, this time in the master bedchamber at Malfoy Manor. "All present and accounted for, I believe."