End of Contract
When it comes to dealing with your partner after learning that they have committed adultery, there are several ways of going about doing so. It is safe to assume that most people would feel hurt and frustrated by learning the news of something like this, but everyone responds differently.
The fact that this person decided to avoid all other forms of confrontation and just send their partner an end-of-tenancy notice is remarkable. The fact that they owned the house and not the other way around certainly allowed them to do this. Sometimes the least amount of confrontation is the best course of action.