Snape adopts Teddy - Found
i don't think the relationship ever got explicit, but it did end with Snarry. Teddy's just a toddler when they discover he's a full werewolf. Andromeda's scared of him and puts Teddy up for adoption. Harry finds out too late, Snape's already been granted custody, i think he used his Potion Master status and convinced the courts he was going to use Teddy as a test subject. because of that Harry forces himself into their lives. the only other thing i remember is it ends with them moving into a house with ghost cats because Teddy finds them running from him funny.