I do believe they made the Unbreakable Vow, I knew Dumbledore had his wits about him at this time, and for Snape to lose Lily made him vunerable, but I dont believe thats why Dumbledore puts full trust in him. I believe the Unbreakable Vow was just to draw the line, because I know Dumbledore made out clear to Severus that if he loved Lily so muh, he must help her, by helping Harry and revenging her death. |