"Where are we going, mom?" Asriel asked.

"Yeah, where are we going?" Chara chimed in.

"Visiting Dr Gaster," Toriel said simply.

"You mean the Royal Scientist, Dr W.D. Gaster?" Asriel asked. She nodded.

"Cool!" The children said in unison. Though they were of different kinds, they had a lot in common and often responded at the same time. Toriel secretly wondered if they were twins in their past life.

"I've always wanted to meet him!" Asriel said.

"Me too!" Chara said.

They continued their little chat as they ventured to the cold, snowed in town called Snowdin, where the skeleton lived.

- - - - - -

"Hey sweetie!" Dr Gaster greeted Toriel as the trio arrived at his house. They hugged each other briefly before kissing passionately. Asriel and Chara looked at each other, faked disgusted faces in a teasing matter before laughing.

"And I see you brought some company," he said with a chuckle as he saw the grinning duo.

"Come in, come in, it's so cold you must be chilled to the bone," he said as he ushered them into his residence, winking at the word bone.

Toriel blushed and giggled awkwardly.

The children, as innocent as they were, groaned inwardly but they still laughed anyway.

When they settled down in the cozy living room, Dr Gaster called out for his two sons. In a split second, a short plump skeleton and a tall lanky one appeared on the coffee table. Asriel and Chara stared at them in awe.

"H-how?" They asked in unison.

"Shortcut. Still need some practice though," the short one shrugged as he and the tall one jumped to the floor.

"The name's Sans, by the way," the short skeleton said.

"AND I'M THE GREAT PAPYRUS! NYEH HEHEHEHE!" the tall skeleton yelled. Everyone covered their ears at his booming voice.

"I'm Asriel!"

"And I'm Chara!"

"I'm Toriel."

"Oh, I know you. The Queen of the Underground, right?" Sans asked.

Toriel stiffened and nodded.

"SANS! WHERE IN THE WORLD ARE YOUR MANNERS?! BOW TO HER MAJESTY!"

Papyrus bowed and smacked Sans' back to make him bow. The force was so strong Sans face planted the floor.

Everyone laughed heartily while Asriel helped Sans up.

"Right. Now that everyone's been introduced, can you bring your two guests to your room, Sans? And no shortcuts, please. Toriel and I have some... adult things to talk about," Dr Gaster said to his son.

Sans just nodded and led the way to his room on the second floor. Asriel and Chara trailed behind obediently while Papyrus "guarded" them from behind, yammering about manners and etiquette of being around the Royal family.

When the footsteps faded, Gaster looked at the carpeted floor. Without looking at Toriel, he spoke.

"Time to talk about our relationship."

AN
Damn it's nearly twice the length of the previous chapter.

Edit:
My phone glitched and this was unpublished.
Sorry for inconvenience caused.