Fiancé (31M) shared a private piece of my (23F) medical history with his parents, and his mother asked to see my reports. My parents called it off. Was this an overreaction?

I was recently engaged to a man. We shared a deep emotional bond, but we were navigating some disagreements regarding our future living arrangements.

A few weeks ago, i very lightheartedly shared a piece of my medical history, very unimportant and no implication but felt I should share it anyways. A few years ago, I had a minor, benign routine procedure. It was entirely resolved and has zero impact on my general health or future anything. I shared this privately to build a foundation of trust.

My fiancé felt he needed reassurance, so he shared this history with his mother and his father. I wasn’t in agreement of this and so there was alot of back and forth where I eventually caved and said that if they would like reassurance they can phone my mum.

Shortly after, his mother called my mother. The conversation started with her politely asking if I was okay, but after my mother offered verbal reassurance and explained that it was a minor, long-resolved procedure, his mother asked, "Would you have any reports you can share with us?"

My father and mother felt that bringing my private details into a family discussion and asking for records for verification crossed a boundary. My father stepped in and called off the wedding.

My fiancé called me later to explain his side. He defends his parents' actions and says that because our families were involved from the beginning, they wanted everything to be upfront and clear to avoid complications down the line. He claims it was not an interrogation but was purely for clarity and reassurance. He also mentioned that because he didn't explicitly disclose the specific physical location of the procedure to his father, my privacy was not breached in the way my family perceived it.

I am struggling with a lot of doubt as it all happened so suddenly. Was my family right to call this off over this boundary, or was ending the entire engagement over a request for reports too harsh? How would you perceive this situation?