You were chilling out at home, when Sans just teleports into the room, grabs you and teleports you back to his and Papyrus's house. He also seemed to be acting a bit different, he seemed.... a bit in love, a bit of a contrast to his usual "laid back, don't care bout nothin'" demeanor. He pins you to the wall and gives you a possessive grin. This won't end well.

"heya kid. i wanna tell you something."

He looked very possessive, as if he would kill ANYONE who tried to take you away, just so he could have you to himself.