My late wife was 34 years old, an excellent nurse, beautiful, outgoing and vivacious, and was loved by everyone. Her suicide left everyone looking for a reason which led to many cruel accusations and conclusions. If she was bipolar and the stress of the surgery caused it to surface it would give a plausible explanation for the act.
So very sorry for your loss......DEMONS will do that.
What a tragedy for you and your family. I hope things have improved for you all over the years.