To clarify my question: Is there a way to maintain ownership of a private key even when you intend to reveal it to someone else?
Given that I'm willingly revealing the private key, is there a method or technique that would allow me to maintain control or ownership over that key and any future funds associated with it? Or is it simply impossible to preserve ownership?
This sounds like an XY problem where you need to explain what your objective is for sharing the private key with someone else so that people can help you better.
Otherwise as far as sharing the key goes, you are also sharing the ownership of the funs associated with it and anybody with the key can spend those coins and there is no way to prevent that.