absolutely nothing outside the ordinary. First time I called the friend. Second time I called the mom. Then the dialogues woth the friend changed on their own like "we're doing this again" and yada yada
personally i played it three times in a row and the friend's text varied. The third time I got the final ending (first two i got good ending and barely)
For those who can't get all endings- play it three times!! It was a beautiful game, I honestly loved the mechanics and the final plot twist and the fourth wall constantly breaking. W friend btw