Well, being able to customise a bit Kalyskah's body is a nice feature, even if only the paying supporters can use it, do not take it away if you can.
It is true that the game has (or tries to have, depending how you continue
![Stick out tongue :p :p](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
) a background story, and hopefully will also keep lewd contents
![Stick out tongue :p :p](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
(well, we are on F95, not on a web site about kindergarten educational games
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
) on top and aside the fights (well, in some versions, vampires can hypnotise, so, she could decide to use other ways than killing), but that way, you will be able to keep people independently from whether they want "balloons"
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
, a more smaller ones, a bit more round ones, and the same goes for the body, whether they prefer a skinny one or on the other extreme the "Miss Universe" approach.
Also, I did not play the latest versions, but maybe you could let the possibility (if it is not too complex) of choosing whether to kill someone when drinking their blood, or not - while drink all in one, when you can have a reserve for the future ? ;-)