I'm going to call this a psychological drama rather than a horror film, it is horrible, but it's definitely more of a drama. As other reviews have said there's nothing much new here but it is well acted and creepy. I don't know why people are having a problem with the ending, it's all completely straight forward and it all makes sense.
Spoilers for the entire plot.
Charlotte is perfectly normal, but worries that she might also get very bad post natal depression like her mother. She didn't have a good relationship with her mother and worries she might not be a good mother to her own child, she also worries having a baby will just completely ruin her life and she's not ready for that.
Her boyfriend does not have a good relationship with his mother, Margaret, when he tells her they are relocating to Australia his mother feels completely betrayed by him and she disowns him permanently by having him killed by the stable girl, it wasn't an accident and it wasn't the horse.
Margret and her stepson Thomas are extremely close because they suffered through domestic violence together and Thomas went on to make sure his drunken father died in an "accident".
Margret is the posh lady from the big house so obviously she is considered a pillar of the community, she also employs the stable girl, which would go some way to explaining her loyalty, but Margret was probably blackmailing her into murder.
The posh doctor is on Margret's side because they are of the same class and feel superior to working class Charlotte. The doctor can easily find out about Charlotte's mother's medical records.
Margret and Thomas are drugging Charlotte which is why she has bad dreams and hallucinates, crashing the car.
The doctor conspires with Margret to keep the baby and pretend Thomas is the father, a DNA test is never required unless the family ask for one. Charlotte is put in a psychiatric ward because everyone has conspired to make her seem crazy when she's perfectly well, but traumatized by her treatment and by the grief of losing her boyfriend.
Spoilers for the entire plot.
Charlotte is perfectly normal, but worries that she might also get very bad post natal depression like her mother. She didn't have a good relationship with her mother and worries she might not be a good mother to her own child, she also worries having a baby will just completely ruin her life and she's not ready for that.
Her boyfriend does not have a good relationship with his mother, Margaret, when he tells her they are relocating to Australia his mother feels completely betrayed by him and she disowns him permanently by having him killed by the stable girl, it wasn't an accident and it wasn't the horse.
Margret and her stepson Thomas are extremely close because they suffered through domestic violence together and Thomas went on to make sure his drunken father died in an "accident".
Margret is the posh lady from the big house so obviously she is considered a pillar of the community, she also employs the stable girl, which would go some way to explaining her loyalty, but Margret was probably blackmailing her into murder.
The posh doctor is on Margret's side because they are of the same class and feel superior to working class Charlotte. The doctor can easily find out about Charlotte's mother's medical records.
Margret and Thomas are drugging Charlotte which is why she has bad dreams and hallucinates, crashing the car.
The doctor conspires with Margret to keep the baby and pretend Thomas is the father, a DNA test is never required unless the family ask for one. Charlotte is put in a psychiatric ward because everyone has conspired to make her seem crazy when she's perfectly well, but traumatized by her treatment and by the grief of losing her boyfriend.