NOT MINE!
Hermiones thoughts in Italics!

Chapter 5

"Well, as you know, it was me that murdered Dumbledore…"No crap! Go on, try and justify his death…
"…but I did not want to. When he was with Harry doing god-knows-what, he happened to drink both a poison and the draught of living death…" Oh yeah, how do you know? As if reading her thoughts, he began to speak again.
"…he used legimency to tell me about what was happening. When he returned to the Astronomy Tower with Harry, he froze Harry, who was under his invisibility cloak, and Draco barged in on him. Several minutes later, more Death Eaters came in, including myself, and I was told by Dumbledore to kill him. The pain he was going through was excruciating…"but Harry never told us any of that…
"and when he was pleading, it was for me to kill him, not for me to spare him…" but Harry…Harry must have been lying, because that's not what he described…."
So I did kill him, I had no choice. I had previously been forced to go through with not 1, but 2 unbreakable vows. 2 unbreakable vows! But that's really hard to do, really advanced magic I hear…
"The first one was made by Lily Potter and Dumbledore. I swore never to willingly take my life…"That explains a lot…
"…and the second was made by Bellatrix Lestrange and Narcissa Malfoy. In that one I swore to do the task the Dark Lord assigned young Draco. He was made to kill Dumbledore, but I had to do it for him". But does that mean that if you didn't kill Dumbledore, you would die. But that means dying willingly, which would break your other one….
"
if you break not 1 but 2 unbreakable vows, your soul goes to hell. "Not that you weren't going there anyways.
"Now I know that sounds absurd, but it's true. I have never wanted to be his servant, my allegiance is to Dumbledore. The Dark Lord has never heard the whole prophecy, I only told him the first half of the prophecy to prove my allegiance to Dumbledore." Oh my god! That's why Dumbledore believed that you were on the goods side. It all clicks!
"Well, here goes the next part of my hellish confession…