The stolen child / Jennie Felton.

"1911. When Stella Swift is discovered holding a shard of broken glass near her newborn baby boy, fears that she might harm William result in her being taken to Catcombe - the local asylum. Although the regime is not as harsh as it once was, it's not somewhere that Tom wants to send his wife - but he has no choice. Turning to his kind-hearted sister-in-law Grace for help taking care of his other three children whilst he keeps working at the mine seems like the simplest solution until Stella is well - if only there wasn't the shared history between Tom and Grace... At first Catcombe seems to offer the respite Stella needs - until one day she becomes convinced that the baby the nurses have given to her is not William. Is Stella losing her mind? Or is it true that a mother will always know her own child?"--Publisher description.