"Admit when you're wrong. Shut up when you're right." -John Gottman (This man knows a LOT about what helps - and what hurts - relationships. He's done tons of research on it, read his stuff it's amazing.
No one is entitled to know your business if you choose not to volunteer the information. Mature people accept that. Tiny, jealous people rush to judgement, looking for or creating nefarious possibilities because they can't handle being out of the loop.
“There was no scientific achievement, or novel prizes, nothing that should logically make you better than your siblings. But Mom saw your great heart. She said that a mind filled with knowledge is nothing without a heart filled with love, and while you were a far cry from dumb your still were not the smartest one on the block. But Mom said that your heart of gold was worth more than all the riches of the world.”