(This is mixed with a dream and stories I heard, nothing cannon) This is a AU of Storyshift where Sans was the King of the monsters and has a castle that he lived in... his dad (Gaster) was supposedly killed during the human and monster war and his mom (Arial) went missing just leaving Sans and his brother Papyrus... Years passed and Sans realized that there are millions of secret tunnels underneath his castle and explored them all... one of the rooms had a message and a diary from his mom... he realized his mom went underground due to her being extremely depressed after her husband died in the war (These tunnels are around 4'5"... extremely small to get into)... many, many years passed and Sans married a human named Frisk and had 3 children... Francine, Sophie, and Sand Jr. (Also known as Jr) and Papyrus married a Royal Gaurd named Red and has a daughter named Eras. Sans and Frisk's children Francine and Jr are skeletons but Francine didn't inherent any magic, While Sophie is a Human like Frisk but inherited Sans magic. Papyrus and Red's daughter is a skeleton and can summon swords like her mom. One day Sans was in the room in silence with his crown on the ground and reading Arial's diary until he heard movement behind a wall. He blew open the wall with a Gaster Blaster and found a huge room with blue glowing echo flowers and a wattrfall in the middle that seemingly glow. Then he sees a skeleton in a grey hoodie look over with a sweet smile and tone Arial: hello son... She hugs him and starts humming as Sans sobs Sans: i... missed you mom Arial pats his skull Arial: i missed you too my little funnybone... Tra la la~ She keeps humming softly as she holds Sans close