What is this Feeling?

Bella was walking through the halls of Hogwarts when she ran into someone going the other way, knocking them both to the ground.

"Sorry," she muttered, picking up her books and helping the girl with hers.

"It's alright–" the other girl stopped as the two witches locked eyes. It was none other than Andromeda Black, Bella's sixteen-year-old sister, who had barely spoken to her in years. For a second, the two just stared, unsure of how to break the suffocating silence.

"Andy?" a voice called and the two turned to find Alice, a Gryffindor pureblood looking at them (though it was more of a glare directed at Bellatrix). Andy shot up faster than a golden snitch and hurried to her friend, back to her sister. "I don't know how you stand having her for a sister," Alice gushed, causing Bella to clench her books. Andy shrugged.

"These things are sent to try us," was all she said, before turning the corner, never looking back. Bella sighed; rather conversely to Bella's approach, Andy had done her best to distance herself from her father and thus, the rest of her family. Studying with blood traitors, refusing to eat at the Slytherin table, even supposedly going on dates with mudbloods! It was utterly horrifying, the thought of her dear sister affiliating herself with the people who made it so that wizards and witches lived in hiding, instead of allowing them to live open and as equals. But the black haired Black just shook her head and picked herself up. No use mourning those who had chosen their way. Better to press on and not look back.