I know that at the end of Dawnguard you can convince Serena to become human. Am I still able to do this if I agree to let her make me a vampire lord?

You can only supposedly convince her to become a human if you don't mention a cure until you finish the MQ of the DLC...and prolly.

Idk why anyone would wanna' cure her though, she loves it.

Really? I'll have to talk to her more. Didn't realize she loved it that much.

Yeah she considers it a gift like all the other Volkihar vampires do from Molag Bal..even though since shes a pureblooded vampire that means Molag Bal [censored] her, not just her..her mother too and all pure blooded vampires..none are safe from Molag Bal.

When asked she just says it was degrading and she doesn't want to ever talk about it.