Perhaps someone can lay out systematized triggers and anti-triggers for Progress with Julia and Nick for different events at different stages of relationships. Earlier, at the first passage, I reached stage 4 of 6, and new events ceased tightly. I started the game again and got stuck already at stage 1 of 6, although I did the same thing as during the first pass. A conversation with Julia that Nick needs time for parting with his other girlfriend, occurred 6 game weeks ago, but Nick does not appear in the house.
The other events - outside my home - are made without any problems.
With hope.
PS. Perhaps my greed in the desire to "earn" more money by searching for jewelry in the hotel by means of multiple save-load- screens at the reception affects?