I sent in a bug report for the Grymforge kiss like four months ago, and support said that it was a mod-related issue. However I don’t use mods. Hopefully they don’t still think it’s mod-related.
Edit: Okay the patch notes entry was just, “If you're romancing Shadowheart in Act II, she'll have more banter as you're walking around.”
Seems that the dialogue MUST be bugged if there’s nothing.
They did? I hope by now they've received enough bug reports to see that it isn't mod related. I know of people playing on console who aren't getting the kiss either, so it can't be that.
We'll just have to settle for sitting on her stool for now.