Definitely not a true story. 'The Shrink Next Door' is made up for entertainment purposes. It doesn't draw from any real-life situations or individuals.
The 'The Shrink Next Door' is a story that involves a complex relationship between a psychiatrist and his patient. It shows how the boundaries between professional and personal can become blurred in a disturbing way.
Well, it might be about how the shrink and the neighbor's paths first crossed. Maybe they met at a local event and the shrink's professional identity came into play right away. Or perhaps the neighbor had heard about the shrink through the grapevine and approached him with a problem that was the start of this whole story. It could also be about the setting where they live, like if it was a small community where everyone knew everyone, which affected how their relationship developed from the very beginning.