So last time, Drizzt and Zaknafein had their clearing of the air. All secrets revealed, kindred spirits found at last. UNFORTUNATELY, Drizzt's mom happened to be scrying them at the time. So they know too.
But unfortunately, we don't actually get to see the aftermath of that this chapter, because we're following Drizzt as he wanders about Menzoberranzan instead.
( I mean, okay, yes. We do need to resolve the Masoj/Guen stuff. But do we really? Because there's something else about to hit!!! )