1800s.
A woman gets pregnant by a wealthy man who needs a baby.. On a ship...
The man takes the baby girl
The woman regrets that she sold her daughter
She searches for her daughter for 7 years.
She finds her and moves there as a teacher
She teaches her daughter without telling any one that she is her mother while the father is on a journey
When he returns, he start to fall for the teacher
But he is married to a bedridden, sickly wife