New family members?

Do you ever think that more vampires could be adopted by the Cullens? Could Carlisle find another dying person and turn them, or do you think any pair of vamps woudl pull a Jalice and just arrive? So, my follow up question is...what would the newest member(s) of the Cullen coven be like?

*****I always have to voice my own ideas: I think there should be a vampire like this one character in the Mortal Instruments Book Series (On the chat, i have been recommended to it) named Alec Lightwood. I love his character--he's very clever and timid. BUT he is gay. It'd be a new twist, huh?

Either him or another character of the same series named Jace Wayland. (Please read the books if you haven't yet. There's a very jacob/edward-ish love triangle and supernatural stuff. It is recommended by reviewers to BUFFY THE VAMPIRE SLAYER fans!)