In the fic Severus favors Harry and Harry ends up pregnant first. Then later Draco does as well. Severus is their dom. and they have to keep their creature inheritance a secret because they are a dark creature that isn't looked on well. Also Draco at one point tries to fool around with Draco and it ends badly for him. That's all I have right now. I just know it complete as well because both Draco and Harry have their children and at the end it has them sending them off to Hogwarts.