im very curious what is the bella x carlisle fic
omg bless you for asking me about this because i never get to talk about this fic with anyone!!! okay. i have exactly two long fics i reread religiously once a year, and this is one of them. i will never get enough of it.
the fic is called take this heart. the idea is that 'vampire mates' are a more serious business in this universe, with vampires knowing instantly that they're mated when they see each other the first time (but the instinct usually doesn't appear when one person is still human...). so yeah, carlisle and bella are mates (and esme and edward, which is very cute). it also gives bella a darker past (tw: abuse, read the tags for sure). i think the only thing that would stop a person from reading this is the writer's portrayal of charlie, but if you stick it out, charlie's character arc is so so good. i do think you kinda have to take him as a completely au version (canon charlie is a great dad, and he's really not in this fic), but otherwise:
featuring: an incredibly nuanced portrayal of all the twilight characters. i'm serious. jasper moonlights as a therapist but also his traumatic past is well evident in how he clashes with and protects the cullens. edward is incredible, a great friend to bella, in a way that i think romance kinda ruins the possibility of in canon. also, they do some fake dating and it's very entertaining. jacob is hilarious and complex and throw any love triangle bs out because he is there to be bella's BFF. rosalie is frustrating and justified and vengeful and UGH you just have to read it. alice, esme, and emmett play smaller roles, but they come in clutch in key moments. the quileutes and volturi are around and just better than canon in every way. (chelsea is especially very well explained/portrayed)
bella is flawed, difficult to get close to, genuinely funny, quirky without being annoying which is so hard to write. her journey to happiness after so much tragedy is honestly inspiring, and some of the advice that she gets from the people around her (esp jasper) is seriously applicable irl. she loves carlisle in this way that too big for her human soul and it's achingly perfect.
and carlisle... i can't even tell you. he's not perfect, he can be angry and needy while still being that paradoxical vampire doctor, paragon of goodness guy. he has an incredibly complex relationship with god that i feel like is that one canon scene where he talks to bella in new moon x1000. he loves bella in this beautiful, selfish way that is just really really enjoyable to read.