Specific fic search, pairing: sam/dean. Found in comments!

[mary-key84.livejournal.com]

Hi!
I'm looking for a specific sam/dean fic. I read it not very long time ago but unfortunately lost it. It is a multi-chapter kind of au fic, in which Castiel and Uriel (or maybe Zachariah, but I think it was Uriel) are discussing the Winchesters' bond. The fic presents different scenario of Sam and Dean's relationship in each chapter. The boys meet in different circumstances and they are not brothers but they turn out to be soulmates. In one chapter Dean is a patient waiting for a heart transplant and Sam is his doctor or perhaps nurse. Dean is flirting with Sam but when he learns that there is a donor for him, he proposes. Then it turns out that someone else is going to get the heart and Dean is ready to free sam from his promise but of course Sam is determined to marry Dean. This is the chapter I remember best. I hope someone can recognise the fic.
Mary-key84

Comments

[chellexxx.livejournal.com]

This one?
xxx

One Hundred Percent Reason to Remember
What's the difference between love and lust? Castiel and Uriel have their own opinions about what's between the Winchester brothers, and each is determined to prove the other wrong. The true test comes in the form of multiple alternate scenarios which make one thing absolutely certain: Sam and Dean will always find each other, despite the circumstances in which they're placed. But is it love or lust?
http://trinipedia.livejournal.com/71851.html

[mary-key84.livejournal.com]

Yes, thank you so much!