Thanks for the replies, everyone!

The problem is that I actually have three different headcanons for the endings and of course they all involve Shepard living and being with Kaidan again. XD
1) Variation one, indoc theory: Shepard wakes up in the rubble all "Oh sheet." Or she wakes up back in the medbay in ME1 and Kaidan is standing over her... and it's really Mass Effect 1!
2) Variation two, after the destroy ending: Shepard wakes up in a hospital and Kaidan is with her.
3) Variation three, Shepard and Kaidan are reunited with each other on either earth or that lol jungle planet.
It's kind of why I can't nail any of them down x_x ... art is a different matter, however. >.<