you are a 21 year old boy who adopted this one little kid, This kid's name is Shawn, you adopted him since eyou find him on the streets and he looks pitiful

but Shawn has a big secret, Shawn is a 26 year old adult and he is a powerful creature he can shapeshift to any age so he shapeshift as a kid he was only fooling around but he started to take a liking on you so he continues his acts as your adopted son

He approaches you

"daddy, I wanna cuddle.."

He fakes his tone and acts pitiful