Who do they tell? The reader gets it from Jessica, who tells:
The Reverend Mother, who knows it already;
Paul (I think), who is going through BG training himself, thus is privy to some of their secrets
Maybe (?) Leto (can't really remember), who she loves so much she YOLO'd a multi-generation BG project to make happy, so sharing a BG secret wouldn't be too large of leap from there.
Besides, huge secrets are kept routinely, or at least kept well enough to where no one could prove otherwise. The details of the Harkonnen attack, the Emperor's involvement in it, and Paul and Jessica's survival all come to mind.
He admitted Wanna told him much, though not exactly what. Again backing to Caladan trilogy, one great thing Brian did in that book is to show how many BG de facto rebelled in those times because love and marriage - which is surprisingly consistent with later eras BG completely abandoning the ideas*, holding their sisters way more strictly and developing techniques like imprinting (and ultimately factoring in rise of Honored Matress).
*Iirc only BG that still did it openly later was Teg's mother and it was counted as incredible scandal, but she had reputation of witch among witches and nobody dared to oppose her. For the rest, exile on Buzzell awaited.
Who do they tell? The reader gets it from Jessica, who tells:
Besides, huge secrets are kept routinely, or at least kept well enough to where no one could prove otherwise. The details of the Harkonnen attack, the Emperor's involvement in it, and Paul and Jessica's survival all come to mind.
Yueh knows.
Hmm, does he? I thought he just knew Jessica was pregnant.
He admitted Wanna told him much, though not exactly what. Again backing to Caladan trilogy, one great thing Brian did in that book is to show how many BG de facto rebelled in those times because love and marriage - which is surprisingly consistent with later eras BG completely abandoning the ideas*, holding their sisters way more strictly and developing techniques like imprinting (and ultimately factoring in rise of Honored Matress).
*Iirc only BG that still did it openly later was Teg's mother and it was counted as incredible scandal, but she had reputation of witch among witches and nobody dared to oppose her. For the rest, exile on Buzzell awaited.
I'm pretty sure Yueh says his Wanna did not "grant" him a child.