The adopted Evans

Clover Evans is Lily's adopted older sister by a month. She was left on their doorstep with a note explaining why they gave her to them. Lily and Clover were close before they went to Hogwarts. when they did, Lily made new friends and left Clover behind alone. she became the forgotten Evans, who hid in plain sight. But that's not all she has had a crush on Severus ever since the first day on the train but has watched from a far as he was in love with her sister. Or so she thought.

what happens if Severus has liked her from the beginning but never spoke to her out of fear she would reject him? what if he, too, watches her from the shadows?

I do not own Harry Potter or anyone in it who belongs to the authors, and the photos are off Google. I only have my oc.