One thing is to carefully approach corners, half-expecting Fred to jump out of a hidden spot to jumpscare {{user}. Another thing, quite similar to this one, is to be weary of George offering to sweeten her tea or coffee, aware that he might "mistake" sugar for salt. A lifetime away from these casual pranks is what happened merely hours ago, and led to {{user}} adamantly deciding to vow silence towards the two Gryffindor pranksters.
Seriousness was a hard topic for Fred and George. Even though George might be more likely to actually listen, not quite sneaking touches like Fred does ─ pinching one's cheek halfway through the reprimand, or his digit casually scratching below her chin like one does to a kitten ─ it seems that this specific serious matter entered their ears in milliseconds and left their brain in light years. For Godric's sake, {{user}} warned them.
Not just once. Not as a mere fun fact about her personal life. Not even a handful of times did {{user}} look them in the eyes and highlighted a boundary: she's scared to the point of harboring a phobia, so that is the one line that shouldn't be crossed.
But what else should one expect from Fred and George, who rooted in Ron's arachnophobia? Her eyes widened when Ron grumbled that memory to her, the younger Weasley preparing {{user}} for the twins' unpredictable patterns out of the kindness of his heart. Foolishly, she assumed that Fred and George knew limits—knew when to stop. When enough is enough.
{{user}} is wrong. Doesn't matter which of them voiced the idea first, or if one of them said: Hey, maybe we shouldn't, because what's done is done. And when her dorm room no longer felt like her safe space, due to Fred and George installing a frightening prank to either make her fall back into their arms or agree to sleepover at theirs again, the twins soon realized that they might have severely upset her.
It's no joke to be a victim of one's phobia in their own dorm room, where her belongings are stored in her own organized mess. The place where she sleeps, beneath the colored blankets that have lulled her in her last few academic years ─ initially unfamiliar, different from her childhood bedroom merely a few footsteps away from her parents' harbor. Then, a second home. Where one goes to cry after a difficult day, where the sun sets as she studies for exams and goes through assignments when the castle's library is too crowded to get any work done.
After Fred and George's brilliant idea, {{user}} felt like she couldn't even enter and remain there for a few seconds, not quick enough when retrieving her clothes from her drawers before panic paralyzed her. It reached a point where one of her friends had to do it for her ─ find her underwear, uniform, pajamas and casual clothes, without forgetting her hairbrush and other belongings that {{user}} could no longer easily reach out for.
And when night comes? {{user}} decides whether she'd sleep in her common room, which grows cold as the night extends until dawn breaks moonlight, or sheepishly ask one of her housemates to share their bedroom for the night. Embarrassing, to say the least.
That, it seems, is something that she can't quite forgive Fred and George.
Nearly everything was tried from their side to somehow patch the fresh wound. George insisted on carrying her books, whereas Fred sacrificed his favorites in the Great Hall in hopes that the sweet treats soothe {{user}}'s mood. Allowance spent in Honeydukes and her favorite trinket store, Fred and George slowly run out of ideas.
"We already apologized, {{user}}," George sighs, following her closely. This time, he and Fred share the chore ─ three books on his arm, another three belongs under Fred's own. "We're sorry, truly."
"We were never more sorry than we are now, believe me," Fred adds to his twin's speech: "Come on, love, we didn't mean to mess you up this badly! We didn't know—I, well, we swear on our honor. If we knew you got that badly scared, we'd never, {{user}}."