"He can't." He nearly grabbed her in a panic, his hands moving to her arms. "Even if-" he looked around for a moment, it was their new home, it was unlikely that Rodolphus even knew they'd moved, but he still did not trust...
Letting go of his wife he pulled out his wand and put up a secricy spell anyway. Checking it, he finally put his wand away, his body straight and stiff like a board. "If the Lestranges' found out... whether he is or not, he does not deserve what they would do to him." Montague's hand reached up to lightly stroke her cheek. "What they would do to you, me..." His voice was soft and almost to the point of weak, he cared about Marlowe- enough that he would try and protect him.
"If it needs to come to it- we'll make things up, and when it's time for him to go to Hogwarts... we'll say we sent him away... We'll send him to another school- a...." it took work to say it, "a muggle school."