The Fallen Angel - Underfell

Heated

⚠Warning, mature content ahead⚠

A week passed and Sans couldn't get the last kiss he shared with Frisks out of his mind.
His face would become flushed, which is why Papyrus thought he got a fever.
"Tch...no wonder you got sick...running around without a jacket. You're such a bother....go into your room and don't you even dare coming out until you got better....."
"Yes Boss." Sans mumbled
Sans was surprised Papyrus hadn't scolded him or hurt him when he heard Sans had beaten up those guards. Papyrus probably thought it was their own fault for getting drunk.
Papyrus was in fact pretty proud and even amazed for his brother to do so, although he would never tell nor show.
Sans stumbled back to his room and lied down on his bed.
He faced the ceiling and closed his eyes.
The image of Frisks blushing face flashed through his head.
Sans opened his eyes again.
"She looks cute when she's blushing." He muttered.
It didn't take long for the images become pretty....lewd...
"God...why am I thinking about these...I really shouldn't..."
He couldn't help to feel the urge to go touch himself.
After all, a faint glow started to emit from his shorts.
Sans cursed himself for feeling like this and let his hand creep into his shorts softly rubbing his glowing bulge.
While stroking it he let out a soft sight out of relief but it still wasn't enough.
He closed his eyes and started to rub faster.
He almost fell out of bed when his phone vibrated.
His eyes shot open and he took his phone.

Hey Sans, It's been a while since we saw each other hopefully we'll see each other soon again....I really miss you and I can't stop thinking about you.
"Neither can I." He chuckled
Hey Doll, I miss you too, I'm craving to see that cute face of yours right now
You mean this face?
Frisk had sent a photo of her lying on the bed, her hair was scattered on the pillow and she had such an innocent sweet smile on her face.
Sans got all red and flustered.
Doll...you have absolutely no idea how you make me feel...
I hope it's in a good way.
I'm not sure really...
Oh...then... How do I make you feel then?

Sans took a deep breath and gathered all his courage snapped a picture of his glowing bulge, and after hesitating a bit send it to her.
...
...
...
Sans...did you...did you really just send a picture of...your crotch...???
Best way I could explain it actually....
Okay then...
I'm sorry I shouldn't have done that....
No no....it's okay.
You sure?
Yea...so...did you start to feel like this due that picture?
No...I...I was...thinking about.....things I wanted to do with you.
Such as?
I'd like to touch you in places nobody has ever touched you before.
...
Oh...
I'm sorry...I...just can't control myself.
No, don't be please...
Maybe it's better if I have some....alone time...
Sure you don't want me to help you out?