Having total disregard for their host country's current law is disrespectful.
She is an employee of the corporation she owns shares in. She is working for her US corporation while she is living and working here.
If you are just passing through, you are a tourist who needs a valid tourist permit. If you are living and working here (for whomever, wherever) you are not a tourist and need to follow the procedures like everyone else, no matter how much money you pour into Belize's economy. Working, paid or unpaid, on a tourist permit is illegal.
The folks that have the resources to greatly impact the economy and drop excessive amounts of foreign exchange into the banking system are usually given great assistance with their compliance issues.
My folks retired here and needed proper immigration status. Retirees are another example of benevolent consumers. Red tape still applies.