There are always motivations to do what is wrong in order to gain something. Maybe it’s lying on a resumé to get a job or taking something from someone that doesn’t belong to you just because you needed it.
First things first: Determine exactly why you need to rethink your honeymoon plans. Is it because of a family emergency or illness? Or is it because of a “force majeure,” like a hurricane or snowstorm? This distinction is important because it will determine what’s covered by cancelation policies or your travel insurance.