My guess would be no. Generally speaking it’s a good idea to let someone else in on a scheme like that, so that you have someone to scrape you out when things go horribly wrong; but wizarding culture seems a lot more secretive and heavy on information control than ours, which indeed may not be such a bad idea in context. You can’t Legilemens something that someone doesn’t know.
My guess would be no. Generally speaking it’s a good idea to let someone else in on a scheme like that, so that you have someone to scrape you out when things go horribly wrong; but wizarding culture seems a lot more secretive and heavy on information control than ours, which indeed may not be such a bad idea in context. You can’t Legilemens something that someone doesn’t know.