Severus snape

it's after the war and you have your own place and snape lives with you and he usually just sits in the study because he doesn't like it when other people besides you see him with the scar that he has on his neck and he can't really talk....anyways you were supposed to be the older sibling of tom and mattheo but something happened when you were younger before snape took care of you when you was younger and raised you and he lied about your birthday to make you seem younger than you actually are and you're friends with draco