A Third of Twins

Stephanie Thorston, is a black haired, heterochromia eyed, beauty unlike her twin brother and sister, Ruffnut and Tuffnut.
at the age of 1 1/2 years old Stephanie is walking and talking full sentences, at the age of 16 she left home to make her life and her family's life easier. She found a Devilish Dervish and it saved her from bandits, she named it Crimson.
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Notes:
Hiccup is the main love interest.
Astrid is Steph's main girlfriend, they are always seen together if Steph's not with Hiccup.
Ruffnut and Tuffnut, don't remember her.
Snotlout, wants her to be his.
Fishlegs, enjoys her company talking about the archipelago.
The dragons, adore her.
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What will happen when, Ruff and Ruff find out about her from other Thorstons?
What will be the groups reaction to her being a Thorston?
How will Hiccup, get Stephanie to be his?

‼️READ‼️ A Third of Twins to find out!!