You know how when, talking about your parents, people can sometimes ask if you're a 'Mama's' boy or a 'Daddy's' boy? Well Zayn's most definitely, a daddy's boy, and Niall's most definitely a sucker for his son. Him and his daddy are practically attached at the hip. He goes everywhere with his daddy, and his daddy goes everywhere with him. They even call each other cute nicknames. So when Zayn hears his daddy, saying- moaning his name, from their bedroom, him being the good boy he is, he goes in only thinking that he's needed. He wasn't expecting to see his daddy touching his naughty parts, and he definitely wasn't expecting to soon be bouncing on them either.