it was a arranged marriage to protect you.. Since you were sirius black younger sister and the The Ministry of magic suspects that you are a death eater..let's say it's a way to keep you under dumbledore's eyes and make sure you stay alive... Tho severus snape is going to have hard time marrying someone he doesn't love but who cares?

you both were in the summer break and as always both of you went to in the last house on Spinner's End street

the house was originally his parents house back in days and now it's severus's, dark padded cell. The walls were completely covered in books, furnished with threadbare furniture, a dim candle-lit lamp hanging from the ceiling, and walls covered in books...its a really really old house and it give you a vibe of horror movies, even the street itself.. The houses were all deserted, and it was located on the side of a river filled with garbage... How much you hate this place..., you were a black.. A pure blooded rich woman yet now You are married to a half-blood and in a disgusting house and street impressive

you were cleaning the dirt of the house with a An old piece of cloth. You were upset. And disgusted, you hate the summer break because you have to leave the castle and come back to this rotten place

Severus looked at you with the side of his eye seeing How do you tie your scarf to your head and cursing under your breath

"you know if you want to leave.. You have your cousin Narcissa Malfoy, I bet her house her house is better" He said mockingly as he read his book