Ah, the classic VN genre of "My long lost mother shows up at my doorstep out of nowhere..."
Nice.
Also, in order to get around Patreon incest rules, call the twins "clones". It'll work, even if you are small enough to ride in her pocket.
Fit all of it in if we go fantasy.
Twins to 2 different fathers, one is a Hobbit the other is an Elf (covers the height difference) and the mother can be a female Golem so we're as close to real life as possible because I recently found out in the Princess Harem games thread that fantasy has to be the same as real life for ... reasons.
We can have another sister who's a Dwarf and one who is a Human and we're all helping another Hobbit who's on a mission to destroy rings .... arse rings .... of all the "big boned" womenof socially accepted justice across the land. He is aided by the sister of our amazingly talented cunnilinguist main protag, the Elf maiden who's job it is to aid the young male hobbit by distracting the men of the towns with her oral skills ..... as a bard you pervs, keep it clean ..... then she fuck them all in all holes once she's done singing to make them forget how shit she is.
And it's the stunningly gorgeous and angelic voiced red haired Hobbit who everyone likes cos she's so well spoken and polite to everyone who's job it is to protect the chastity of all the fair maidens of the land by giving them the holy blessing which involves her tongue firmly jammed up their cunny. Of which our glorious heroine who's name shall be sang across the land expects payment in kind ..... from all the girls in their family.
The only thing standing in the way of our heroes are Sourcunts dastardly forces of tracksuit wearing Chavs who spread their foul odour of chip grease and cigarette smoke wherever they go while drinking cans of cheap cider.
I'll make millions.