Unexpected baby

Purebloods test their children after they're born to see if they have a soul mate because soul mates can't kill each other and they for sure cannot be forced to fight to death. Magic will intervene and make sure they stop by any means. HP and LV/TMR are soul mates and they are forced to stop fighting because of a baby. Dumbledore, Molly, Ginny, Ron bashing. Naive Hermione.