So what I think you're lacking is likes with Roushuk I'm pretty sure 39 is not enough to trigger the heart event, and the comment about revealing the truth must have been about the talk you have with him during the feast where if he was in your basement prison you'll get a little dialogue about he remembering a dungeon like place and you get to tell him that he is misremembering or tell him that's your basement, if you tell him that it's your basement he'll ask the reason as to why you imprisoned him and you get to tell it's because you were trying to find a cure or because you were horny.
(If this has nothing to do with what you asked ignore me my brain is not working right today : P)