Kyle x Reader - Not so hard to believe

This is a cross over with Gravity Falls, so fair warning. You were in Gravity Falls with Bill Cipher and Stanford when the portal was recreated. Stanford being there to stop the action and Bill to continue it. You were there to keep Stanford and Bill from killing each other. Strangely Bill was like a brother to you and Stanford was like a fatherly figure. When the portal was activated you three got sucked in to another dimension. South Park. This family feeling, was no longer a feeling. Bill was now in a human body, looking around the age of nine or ten, you did as well. Stan was looking younger, he looked like he was in his thirty's. What a caring family? Y/n and Bill wonder around for a bit and Y/n sees four boys, one particularly cuter than the others.