I did encourage it recently and now my romance options with Torian are bugged. My character can't flirt with Torian in companion conversations (it just escapes before the dialogue finishes). I think this might be new? judging by other experiences, the mako/torian arc can finish without any issues arising if your try the flirt option. I'm waiting until this gets fixed in a patch before proceeding (which I hope is soon)... but the relationship itself between the two of them is super adorable. Though you can kinda tell they're a little miss matched