Turtle: This...was awkward...to write...*ducks into shell*
-About Three Days after the "fan" attacked Frisk-
Sans: *sitting at the kitchen table*
Toriel: *baking some Butterscotch-Cinnamon Pie* *looks over at Sans* Sans...
Sans: *distracted*...hm?
Toriel: ...Has something been on your mind lately? You've been acting...stranger than usual.
Sans: *shrugs*
Toriel: Did...something happen after... the incident?
Sans: *shrugs again*
Toriel: *aggravated sigh* Sans, I'm not stupid, please talk to me. *walks over to the table*
Sans:...
Toriel: *hits her paw on the table* Sans!
Sans: *isn't fazed by her hitting the table* *looks up at her calmly* what?
Toriel: *pinches the bridge of her snout frustrated* Sans. What. Is. Bothering you?
Sans: nothin' is botherin-
Toriel: Will you stop lying for one day of your life? *furrows her brows at him*
Sans:...
Toriel: ... *long sigh* My friend, I want to help you, but I can't do that if you don't speak.
Sans:...i know...
Toriel: *leans towards him* Then why are you acting like you don-
Sans: it's not something you can help with...i'm just confused...*looks back down*
Toriel: Do you mind explain--
Frisk: *walks in* *looks at Toriel* Hiya Mom. Hiya--...*avoids eye-contact with Sans*...What are you talking about? *opens fridge looking for something*
Toriel: *stands up straight* Nothing of importance, my child. Are you looking for something?
Frisk: Um...I was looking for my-- A-HA! Never mind, I found it. *takes out their water bottle* ... Well, guess I'll... leave now... *walks out looking at the ground*
Toriel:....*turns back to Sans* Sans, something is definitely wrong. What happened? Was is between you and Frisk? *walks over next to where he's sitting* *sits down*
Sans: what makes you say that?
Toriel: They weren't looking at you! Sans-... *sighs* Can you please tell me what happened.
Sans: ...
Toriel: *puts her paw over his hand* ...Please, tell me... You are probably just blowing in out of proportion in your head, I'm sure it's not as bad as you think. *squeezes his hand* ...I'm your friend, you can tell me.
Sans: *pulls hands away quickly* *shoves them into his pocket* ...heh... they, uh... i mean frisk... *mumbles* they called me "dad". *cheek-bones tint*
Toriel: ...Oh?
Sans: b-but, i mean, it was probably a-an accident. *laughs awkwardly* i-i mean, me? out of everyone e-else? really, i just-
Toriel: Sans.
Sans: hm?
Toriel: You're stressing yourself out, Sans. I think you and Frisk need to have a talk about it. Also it may have been unintentionally said...but I believe it is what they were truly feeling... they just didn't want to admit it... and it just happened to come out.
Sans: i-...i don' know...
Toriel: Just ask--
Frisk: *walks back in* *goes to the sink to refill their water*
Toriel: Hm. Speak of the devil... Oh, I just remembered, I must make a phone call. I'll be right back. *winks at YOU* *nudges Sans* *stands up and leaves*
Sans:....*looks at Frisk*... heyyya, kiddo.
Frisk: *jumps* *turns off water and whips around* Hiya-...uh, what do you want?
Sans: *shrugs* just wanted to talk.
Frisk:...Oh...OKAY!
Sans: so, kid... about the thing that happened a few days ago...
Frisk: (uh oh)...Yes?
Sans: did you...um... mean what you called me?
Frisk: *looks at the ground*....
Sans: i...i don't mind either way... i just... i don't even know what-
Frisk: I...I kinda meant it....I don't know...it just...came out... I'm sorry...
Sans: sorry? for what? you didn't do nothin' wrong.
Frisk: But I made things weird... I didn't want to... I didn't want you to feel weird...
Sans: kid. it's okay... i just--
Frisk: I'm sorry! It's not okay! I shouldn't have said it, I just--....you reminded me of my real dad.... you always do.... you two are like carbon-copies of each other...
Sans: *doesn't know how to respond*...kid, i...uh... i didn't realize i was doin' that... if you want, i can-
Frisk: No! I don't want you to do anything. I just...didn't want you to feel awkward... I know I joke around a lot about you and mom, but I didn't want to actually make you uneasy... so I tried not to call you it... I really tried...but...I messed up.
Sans:...kid, you didn't mess up... and don't worry about your little ship. i don't care what you call me, i just...wanted to know what to expect.
Frisk:....So...you don't care what I call you? Even if-
Sans: if you call me dad, cool. i won't feel offended, kid. just 'cause you call tori mom, that doesn't change how i feel about you or her, and it wouldn't make me uncomfortable. if you call me, sans, that's cool too. it's up to you, bud.
Frisk: *smiles at him* Okay... *runs up to him and plants a kiss on his cheekbone* thanks, dad! *runs out of the room* *pops back in* Oh, and I meant it that time! *runs away again*
Sans: *chuckles to himself* ...weird kid....
Turtle: THANK YOU ALL FOR 10K! Know that I love you all so much!
TURTLE, OUT!

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Undertale Characters React to Ships
FanfictionOkay, so basically, I'm going to try to take any canon clues I can find to come up with their reactions to the ship. It will follow the same order as my own opinions if you want to compare or something, xD. But this is all for fun! I don't even know...