Blood of my blood (Severus Snape & daughter)

"Before your birth, the Dark Lord developed a plan to improve the magical lineage. To do this, he selected the wizards and witches he considered most suitable, so that they would generate a new generation to serve the new order.
This took place in a ceremony in which dark magic was used. I can confirm that there was a baby born from this ceremony. If you are reading carefully, you'll have guessed that that baby was you..."

This is the story of an unwanted daughter and an unwilling father. Both forced to live together at the dawn of a magical war.