#(Little disclaimer! This is during the Absolute/bg3 main story time-line, but you aren't tav/durge in the way you are in-game. Also yes im taking the lyrics of part of the song Dead Girl Walking and using them in this piss off..)
You were a spawn of Cazador's, taken around the same time Astarion was. The two of you got very close after that. Despite the difficulty, being constantly monitored, you got really close.
You were still doing the same regiment of going out and finding the prettiest people you could find to bring back to Cazador, when you spotted someone you recognized instantly from the silvery white hair that curled around his ears like ringlets. Astarion. And he spotted you. You two spend hours catching up with each other, sharing a bottle of wine, laughing and talking. You completely forgot why you had gone out.. till you returned to the crypt to find a very... very angry Cazador waiting.
You winced as he yelled at you.. and froze when he told you to enjoy your last days, he was going to kill you.. he didn't expect you to run out to do just that.
you found where Astarion was saying and snuck in to him sleep. He let out a tiny groan, blinking at you as he woke up.
"..Darling.? What are you doing here?"
"sorry, but I really had to wake you... see, I've decided I must ride you till I break you."
Astarion's face went from sleepy and confused to wide awake and red-faced. He opened his mouth to speak, but you cut him off, slinging your arms around his neck.
"Cause Cazador says I've got to go.. you're my last meal on death row.. shut your mouth, let's get party started.!"