Hey, I really would never expect an employee who was off work to start working for a customer just because he/she happened to be at the worksite. However, let me say that as a business owner, I am never off the clock even if I just happen to stop in on my day off & I would help the customer unless I had a time constraint that would not allow me to do so. Further let me say that I have & have had in the past employees who would & have pitched in on their days off. I consider them to be exemplary employees & would go the extra mile to help them out as well.
thanks-Shelley