I currently work at company A. I have worked here for over a year and I love the environment, job, etc. During this time, I have also started my own side business that isn't related to company A, it is more of a product than a business. This does not affect my work at company A at all (performance reviews have been fine, getting raises, etc). I have recently launched my side business product and it is doing decently well for a single person start up.
Now, while I mentioned company A is not related to the start up, it would help them in a huge way. So my boss contacted me today during work and asked me how the side business was going and I said well. He expressed a lot of interest to integrate my side product into company A.
And here is the problem. He believes that because I work for the company A, my side product will be 100% free. Not only free, but work to tailor it to their preferences to fit them. I do love working for company A but I have also worked very, very hard on my product. If I am honest, I would not give the product away for free to another company(and I have not). I'm afraid by saying "hey boss, this isn't free", he will take it as if I am leveraging my position (get paid salary from company A who then pays me agin for the product).
How do I treat company A as a customer/client and not as a employer of mine? How do I manage this situation without it blowing up?
Edit: he never said "it's nice this will be free too", but I am very confident he believes this is the case. Having worked with him for over a year, you start to understand how a person works.