Blackmail (слэш)

This is the missing 'scene' from Chapter 31 of 'It could be a lot of fun or a great big disaster'. You don't have to have read the story but this is going to seem rather abusive if you haven't. *This is from Severus' pov. not sure why I chose to do that, I just did :-)*
Harry comes to Severus with explicit photgraphs of him from a drunken night years ago. He promises to return them on one condition, that he can use Severus for one night, in any way he deems fit.