Ah friends and family.
It is their relationship that makes them feel entitled to you sharing more of your art / knowledge.
This is the same method you can use to make them back off.
I typically use the, "Hey now respect the craft enjoy it for what it is." that tends to stop most of my friends.
If that fails I revert to, "I didn't realize you were so focused on this sort of thing I guess in the future I'll remember that." with the implied threat of never showing them anything again
Tho yes listen to the pro's your using your friends as stand in's for you to practice on. You really need to use them to practice performing on.
Lucky for me most of what I do is hypnotism (This mentalist c*** (not the best) is hard yo). So I can reproduce it
--Infy