Mhm, that would make sense of course. It's a good idea. The problem is only, if Landa makes only subtle remarks, Hellstrom would simply assume that Landa is joking around, because he'd never think that Landa, knowing that he's Dieter's father, would have slept with him. Landa would have to be halfway unambigous about this, or else Hellstrom would ignore the comments as the usual mindfuckery. Unless Landa makes him so curious that, I don't know, Hellstrom goes and asks his mother if she knows Landa.