After Liam told them the story, Jonathan patted him on the back and told him it's okay, that he is there for him if he needs someone, Liam laughed and nodded, while Jack flicked his forehead and asked him why he lied to him, telling his father is dead.
"Well he is now." Liam replied with a cheeky smile, getting a smack from Jack, which he liked.
"I am your big brother so I have the right to know." Jack said, looking at Liam with serious eyes, even though he was denying that before, when Liam asked him. He only denied it because Liam was being creepy/weird that time and he just blurted it out but in reality, he does think of Liam as his little brother, as a sibling, not the same as Lola but still and he likes to think that Liam thinks the same.