>>105532522She never came clean.
She knew what giving birth to Steven meant, she did a great deal of legwork to prepare him for life without her, but unless the chest in Pinkspace has a "So you've learned I'm Pink Diamond" tape, she totally went to her very real death without giving Pearl the all-clear to divulge her secret should it become necessary.
Now, obviously, Pink doesn't seem to have known about the ongoing fusion experiments, the cluster, or any of that, but she had to imagine someone would come knocking again at some point, and leaving Steven and the CGs in the dark about her identity is the direct cause of several of the more dire circumstances in the series.
She was going to be gone forever, and at the end of all things she got away with it. She snuck into oblivion surrounded by dear, personal friends who thought she was Rose Quartz, and her oldest, dearest companion who both knew she wasn't, and was bound to keep that a secret against her will.
That's fucking evil.
