I have a soft spot for forced bonding fics and you handled this one well. Harry came across as very young and innocent, and Severus had that bit of darkness that made you wonder what his motives might be. Dumbledore was his usual manipulative self, though I wondered at times if he was fully aware of Severus' actions.
I kept wanting Sirius to show up just for his reaction to the bonding! Ah well, gives me something to imagine!