Cats and Bats in Mahogany Hall

I come seeking a bit of advice
Let us say someone had gained the trust of both the Mirror and the Shroud in Mahogany hall (scandalous to even admit, I know). Let’s say that person ended up getting dragged into a Saturday production of an illusion they simply wanted to watch. Will performing one’s own grand illusion lock a person out of a grand seance? Or will the mediums understand?
Asking for a friend.

I believe it will fix your allegiance firmly to the Mirror. You are forced to choose one or the other eventually.