Toriel swallowed fitfully. She shouldn't be doing this, but she just knew. She had to try.

Toriel opened the door to Sans's room. Normally, it would've been a mess, but since Sans had his own house now, Papyrus kept Sans's room clean in the mansion.

Sans was sleeping on his bed. He had not even bothered to cover himself with his blankets. He moved fitfully in his sleep, calling out randomly. "No." He murmured. "Stop. Please."

"Sans." Toriel whispered. She moved over to his side and shook him gently awake. "Sans, wake up. You're having a nightmare."

Sans blinked slowly, then sat up. He still looked drowsy. "Oh hey Tori. I was having a nightmare?"

"Yes. Are you ok?"

Sans sighed. "I'm fine." He stared off into the distance, looking a little sad.

Toriel looked at him in concern, then cleared her throat. "Ahem. Um, Sans, I wanted to ask you a question."

Sans looked over curiously. "Yeah? What is it?"

She coughed awkwardly. "I-I know you don't really love Frisk. Not really."

Sans blinked, then laughed nervously. "Heh, what do you mean? Of course I love my wife." How did she find out? Was he that obvious? Sans could feel nervous sweat cropping up on his skull. If Chara knew, all hell would break loose.

Toriel watched Sans's expression. "Don't be afraid. It's not very obvious. The only reason I knew was because Papyrus told me."

"Oh." Sans breathed out, then sighed. That was better, he guessed. It meant he was good at acting.

"It's true, isn't it?"

Sans looked down at his hands. Telling Toriel would be okay, right? She was one of his closest friends; he could trust her. "Yes, it's true."

"I won't tell anyone." Toriel said quickly. "I just.. I was wondering if maybe you.. loved someone else?"

Sans looked back at Toriel in surprise. Someone else? "Like who?"

"I know we've been friends for a long time. And.. I-I've loved you since the first day I met you. I was wondering if you felt the same.." She looked extremely nervous, playing with the hem of her robe.

Sans's eyes widened in understanding. Oh. Ohh. "Oh, Tori. Look, I do love you, but only as a friend. I'm sorry if I've ever led you on.." Sans blinked in concern. He really hoped he hadn't led her on; he felt horrible if he had.

Toriel sighed. No. I-I know it's more than friends. I can feel it." She looked away, seeming to come to a consensus. "Maybe you don't understand now, but I can help you to."

She reached over and slipped off Sans's pants in one move. Sans gasped in surprise and backed up against the bedframe, bumping into it. "T-Tori?"

Toriel slipped off the robe she had been wearing. Underneath, she was naked. "I'm sorry, but I don't think you'll be able to call me just a friend after this."

Toriel pushed Sans down, then forced herself onto Sans's dick, causing him to gasp in surprise. "A-Ahhh! Oh god, T-Tori.." She began to set a quick rhythm, making Sans moan, his purple eyelights rolling up.

He grabbed onto her forearms, his eyelights large and hazy. "Tori.." He panted, breaths coming in short gasps. "Please.. This.. This is wrong.."

She pushed harder into him, making him cry out. He gasped painfully, panting for breath.

Toriel lowered her head to Sans's, sliding her tongue into his mouth. Sans whimpered against her, kissing her back and their tongues tangling together.

Suddenly, he pulled back, tears pricking at his sockets.

"Ahhh.. Tori.." He cried in pain. Tears began to streak down his face.

Toriel could tell that he was entering a climax. She soothed him, whispering "Shhh, it's ok, sweetie. Just relax." Had he never climaxed before..?

Sans cried, burying his face into her shoulder. He moaned and shivered against her. "Ahh.. It hurts.." Toriel caressed his back gently in encouragement. "Shhh, it's ok." She smiled down reassuringly at the trembling figure.

With a pained cry, he came inside her, coating her walls in his lavender cum. Sans drooped, exhausted, against Toriel, shivering weakly.

"I love you." Toriel whispered to Sans. "I-I love y-you too." Sans replied tiredly before passing out from exhaustion.

Toriel smiled and eased herself out of Sans. She knew he loved her, but he just needed a push.

She checked his forehead. "He's burning up." She thought. "I'd almost forgotten about his fever."

She put her robe back on and went to the kitchen to get an ice pack. She returned to Sans's room, placing the ice on his forehead. She looked down.

"We've made such a mess." Toriel sighed, looking at all the cum on his bed. She cleaned it up, then left to take a shower. Sans had cummed so much that it was dripping down her legs, but she felt accomplished.

Note from the author: Someone asked me whether Sans really loves Toriel. I'm sorry if it's not very clear. Sans only loves Toriel as a friend. When he tells her "I love you", he means it platonically.