by eroticwriter00
Dad needs to fill Emily's pussy with his seed and start another family. Sarah may even join in the fun
you would decide if it is to be 'first person' i.e. 'I' or 'third person' , i.e. 'Sarah' or 'Emily'!
Example. To start with it seems that the story is from the point of view of 'Sarah' but then "... and after dinner, Sarah went to study with a friend on a course that Emily wasn't taking."
Shouldn't that have been "... and after dinner, I went to study with a friend on a course that Emily wasn't taking."?
You have set the scene well for various story directions, some obvious and others to surprise us readers. Please keep developing slowly with intimate details.
He needs the daughter more.