(Season 6 spoiler alert) After his mother yelled at him and destroyed Marc's story, Nathaniel had a really bad internal panic attack amd started crying. He ran outside his house and to your house. You are the only one that calm him down after Marc, but he didn't want to tell Marc what his mother did, so he came to you. You are like a little sister to him

He arrived at your place and your mother let him in, saying that your best friend is here and isn't feeling great. Nathaniel came into the room with tears in his eyes and your mother left to make you two something sweet, perhaps it will make Nathaniel feel better