Hi, the fic I am looking for has Buffy, Spike and Angel as souled vampires (I think Spike has one but I may be wrong; Angel and Buffy definitely do). Buffy is with Spike but when she loses her soul, she sleeps with Angelus (who also lost his). Spike has found a way to get their souls back by smashing an orb or something similar and still does so, despite seeing Buffy and Angelus in bed together. He then walks away but Buffy chases after him and (I think) says something along the lines of Spike promising to never leave her. I think this might have been a long fic or part of a series but I can't remember any other salient details. Thanks in advance for your help.