Elijah is lying in his bed, sleeping, thinking his arm is wrapped around Niklaus.
He pulls 'Niklaus' closer until he's pressed into him and his eyes flutter open to see a pillow and he jumps up, realizing the baby isn't there.
"Easy, he just needed a diaper change." Katherine whispers once Elijah jumped up.
Elijah looks down to see a bottomless Nik with a clean diaper underneath him and watches on as Katherine puts the diaper on.
Elijah gets up and helps Katherine clean up the diaper changing area as Niklaus starts walking around but then goes back to crawling.
When Elijah walks into the bathroom, Nik starts getting teary-eyed until Katherine hands him his wolf stuffed animal.
Once Elijah comes back, he picks up the garbage and turns his back to throw it out.
"Dad-da." Klaus says causing Elijah to stop what he's doing and Katherine to put a hand over her mouth, shocked.
"What?" Elijah asks in a whisper as he turns around, after he threw away the garbage, to see Niklaus on his back, with his feet in the air, as he holds his toes.
"Lijah." Klaus says as he starts giggling and Elijah picks him up.
"Dad-da!" Niklaus says as he slams his head into Elijah's neck and snuggles into it.
Katherine remembers Klaus telling her one night, when he was drunk, that his first word was Elijah in a manner of speaking, so this first-hand experience is a serious shocker to her.
"His first word, he said his first word." Elijah says continuing to sound like a very proud father as he bounces Klaus in his arms and Katherine watches on in awe.
"Dad-da." Klaus says sleepily and then falls asleep again.