Ethan is handed a piece of paper (the sonogram) while sitting in his car seat after the mum's scan.
After a few failed attempts at guessing who it is - "It's me! No, it's you" - his mum finally reveals she's going to have a baby.
Cue a lot of questions for his mum about how it happened, before he adds magnanimously: "He can sleep in my bed with me. If he wants."