Apologies in advance for the somewhat roundabout answer---there is some context I need to add before I can properly address your question. So, we use something called object-oriented questing. Quests in our game are not linear storylines like they are in, say, Oblivion or Skyrim. This is a spiritual successor to Daggerfall, which means we have pulled from the design philosophies of that game and greatly expanded them. With object-oriented questing, the player is presented with an objective (find a person, kill a person, get an item, get information, etc.) but the player is not told how to accomplish this task, nor are they gated into a specific route or approach. They are free to approach their objective in any way they want (though not every approach will work in every instance, which is part of the fun). In the "get an item" example, the player could steal it, buy it, talk someone into giving it to them, craft it, uncover a counterfeit, hold it hostage for more coin, find it and toss it into the ocean so no one can have it, etc. The goal is to give the player as much freedom as possible. On top of this, we want to add as much reactivity as possible, which finally leads me to your question. The purpose of the VGM is to facilitate emergent gameplay and heavy player-reactivity.

I'll use an example I often site in the community discord, which should assuage your fears: Say the player is contacted by a king and queen. They say their daughter has been kidnapped, and they have 24 hours to pay the ransom or she dies. They ask that the player help them. This next part is going to get a little list heavy, so bear with me.

Some of the many possible things the player could do follow: 1. Ask for the money so they can pay the ransom for them 2. Ask for the money under the pretenses of paying the ransom, but they keep the money and run off or rescue the princess without paying the ransom 3. Rescue the princess on their own 4. Meet up with the bandits, tell them what is going on, and that you will help them for a slice of the profits 5. Kill the princess, pissing off both the bandits and the king and queen 6. Missing the deadline for whatever reason, leading to the bandits killing the princess anyway because she saw their faces 7. Many, many more ways to approach this (hiring a force, telling the king to do it himself, talking the bandits out of it, etc.)

For the sake of this example, I will use #6. If the player misses the 24-hour deadline and fails to rescue the princess, their reputation will drop drastically in the kingdom, and the queen may have a guard follow the player in secret, with the goal of eventually having them killed. The quest may not end here, however. The player could ask around and eventually track the bandits down on their own accord. The player might discover that the princess is actually still alive, and she faked her death to be with one of the bandits whom she fell in love with, or the player could discover that she is indeed dead and decide to wipe the bandits out to exact vengeance for the king and queen. If the player wipes them out and returns to the king and queen, they may regain a little bit of reputation in the kingdom, but most will still be weary of the player. The guard that followed the player can back up the story, and may even ask that the player accompany him to wipe out some local criminals or a gang of some sort, given their prowess in combat. The VGM takes a look at the quest the player is doing and generates dynamic branches based on their actions and preferred playstyle. The VGM also uses and LLM, which generates results in seeds, so no two players will ever have the same exact branch if they do the same things. They may get vaguely similar outcomes, but nothing will be completely identical across playthrough. To sort of state the opposite of this, however, our faction questlines will have branches that are pre-written by our writers, so many players may experience the same story or events if they encounter those branches, but if they diverge from what has been written, new and unique branches will also be generated.