I had to get hint for the last 2 since you had to talk to the angel for one and the other requiring a bit of returning to the mines for that. I just used the 5 hint coins and reload back to keep it. I honestly was half expecting the dad to be a horror element or the autosave to keep track of events where you would "cheat" by sparing your hint coins too. But I guess that didn't happen. I would have been more amused that way.