Ehm... right... how to say it? You aren't a vampire spawn, she wants to be bitten by a vampire, your Durge might be murderous, bot they aren't a vampire.
If you use a mod for that, it is still not canon.
My DUrge is a vampire spawn though. No mods involved.
Astarion turns you into his spawn if he ascends and you continue to romance him. You even get a bite attack for the happy buff.
Even as a DM, I would reject the idea as unless you are vampire/Dhampir, etc. It doesn’t count.
They are!
