Where things get complicated is that Aylin was originally the culminating test for Shar's justiciars. She lost that function when Ketheric was defeated and turned to Myrkul and the gauntlet abandoned . After that her only function left was keeping Ketheric immortal, but for that she had to be removed from Shar's domain. So what I mean to say is, that when she was captured iand imprisoned in Shadowfell it was not simply as Ketheric prisoner but (more importantly?) as part of a Sharran ritual. Also, as I mentioned , just constructing that gauntlet below the mausoleum in less than a century time would not have been possible without some kind of divine intervention, I think.
