I can provide some general insights on this topic.
The decision to stay with a partner who has experienced a significant change in their mental capacity due to an accident is a deeply personal one. It involves complex emotional, ethical, and practical considerations. Some people might choose to stay and support their partner through difficult times, while others may find it challenging to handle the situation and may make different choices.
Ultimately, the decision depends on the individuals involved, the dynamics of their relationship, their support network, and their ability to cope with the challenges that arise. It's essential to communicate openly, seek professional guidance, and consider the well-being of both individuals in making such a significant decision. There is no one-size-fits-all answer to this question, as each situation is unique.