Also on a neutral level, I know 100% that Lae doesn't suggest you sleep with her, she says that you "often turn your back on me" or something like that. in general, a neutral level is not enough. Astarion can also reject you with the words " you're not my type." So you either have an approval bug, or your approval is higher than neutral.
With patch 1 or 2 I had Lae on neutral and she clearly wanted to bang my boy. ;-)
