you have to do the "the hellions heart" first so she can 'touch' you without killing you... thats doable in act 2 which makes the romance workable by then

the quest line is a little buggy but thats down to Larian skipping testing and all the camp talks jumping in on top of each other so the best work around is just rest 3-4 times in a row to get it all out of the way

[Linked Image from gog.com]

Luke Skywalker: I don't, I don't believe it.
Yoda: That is why you failed.