Hi Connor;
I am not saying your Mom wasn't in a Honda or made the trip in a Coupe. But, I have had people tell me similar stories, AC, power windows and Automatic Transmissions. They were copes but of the 4 cylinder kind and normally 73 or 74 vintage some later. I even had a gent so sure he had the same car he took me over to his house and there in the back yard was a 1975 Honda CVCC Coupe. Honda did a bunch of stuff to these small cars, heck automobile manufacturers across the board have tried everything (even made cars that fly). The part about the bail of Hay kind of makes me believe it was a later model.
Bill