> Be servant of vampire
> Vampire comes home in a huff from social gathering, pissed off because Miss Wight made fun of her for her (relatively) small bust size
> Vampire tells you in no uncertain terms that she's going to fix that, is going to be feeding on you more and more until she's even more stacked than Miss Wight
> Vampire immediately increases blood intake; starts taking blood twice a day instead of just once, then ups to three times a day
> You suddenly need healing magic administered every day to make sure your body has enough blood to function normally
> New blood intake doesn't seem to have any effect, then one day Vampire realizes to her joy that her old underwear doesn't fit anymore
> Vampire immediately ups her blood intake even more, puts you on protein-heavy diet to maximize blood production
> Effects become more and more apparent with passage of time; vampire goes from lean and mean to much larger, jigglier, even smugger version of herself
> After just a month or two she's surpassing holstaurs and other bovine mamono in terms of sheer bust size, looks like she's soon Miss Abaddon to shame
> Other effects are apparent too; her derriere keeps getting bigger and rounder, her thighs get thicker and fatter, she's even got something of a tummy to go with it all
> Vampire is pleased as punch regardless; loves to go out in public with you to show off her new curves
> Is experimenting with your diet to maximize growth; is apparently working with a lich to have her findings published, other vampires are apparently very curious about their findings