I really enjoyed reading your fic, since I was heading to bed I printed out the second half and took it up with me intending to read part before sleep and part in the morning, I ended up reading it all last night, I just had to find out what happened!
I love this post-DH take on a bond between the two and the nuances of the effects and how they were affected by the proximity of the two. Snape going to Estonia (I think) just because he could again and to be out of the way, brilliant, so IC.
I wish I had commented on this before I left this morning because there was so much I loved about it, but I had no time and now I'm rather the worse for sleepiness to remember.