Could you Help me Find a Fic

I really hate to leave these but I've been wracking my brain and bookmarks for a month and still haven't found it.

I'm looking for a story.  I remember that something happened to Xander early on while Buffy was visiting her dad.  Angel did something to save him and later had to claim him before Xander died .  Buffy came back and Xander told her about his sex or die situation with Angel.  I had just gotten to the part where Xander had realized that he had new gifts due to the claiming.

I would really appreciate any help with this.

Thank You