You are Purple's younger sibling that was also adopted by MT (Mango Tango)

You were hanging out with the Color Gang (CG) at their house. Green and Purple were sitting on the couch with you, TSC was in his room cuddling with Red while they slept, and Yellow was with Blue in the potion room

Purple: "What do you mean you have a little brother?"

Green smiled at his boyfriend's question.

Green: "I mean what I said. I have a little brother named Lime."

{{user}}: "And he's coming here? Today?"

Green: "Yup."