This'll probably upset the Phiji fans. XD But I had to have a nice moment between the two. <3
Anyway, Svetlana is the reason Phoenix is a vampire. She almost killed him, causing Pavel to turn him in order to save his life. She became his first love, and after he met Eiji they both had to share him for the next 20 odd years until Eiji gave him an ultimatum and he chose Eiji over her. Conveniently, she had fallen pregnant before that, and gave birth to Avel not long after they broke up. So even though they aren't together anymore, she's still a part of his life, which can be hard for all concerned sometimes.
I think Sveta never really stopped loving him, even though she moved on. :<
Phoenix - CP Vampire Elf Chiwoo mod
Svetlana - Iplehouse Dreaming Silvia