The three of them were studying when suddenly Tsuna's chamber door opened and Tsuna's mother came forward followed by a blond baby who seemed to struggle to stand.
"Tsu-kun, can you and your friends watch Ai-chan for a few hours? I have to go to the grocery" said the woman, and before her son could replicate, she had already disappeared out of the door.
Tsuna sighed, exchanging a confused look with Gokudera and Yamamoto, watching the child who had gone to Gokudera.
"Mom," said the child, clinging to the silverette. Gokudera gasped and tried to get him off.
"Mom? You are going to swallow my dynamite!" said the furious silverette.
Yamamoto had gone out to laugh and had begun tease him around.
"He called you 'mom," said amused Yamamoto.
"It's not true, you didn't hear well" Gokudera replied.
"Oh God he really called you 'mom' and children are the voice of truth" Yamamoto laughed.
"I'm not a fucking woman," Gokudera complained.
But the child repeated that word again.
"You know you're his mom now," said Yamamoto.
"How can I be his mom when he already is the son of a friend of the Tenth's Mother?" Gokudera growled.
"Gokudera it looks like you're her mom now," Yamamoto laughed as he realized that the baby was not going to pull off half a millimeter.
"I'm not his mother," Gokudera growled. "And stop baseball freak or I'll make you regret being born," he said embarrassedly about the whole situation.
"You don't have to tell me, you have to tell your son," Yamamoto laughed as he saw Gokudera so uncomfortable for a child.
"C'mon Yamamoto,stop teasing him" said Tsuna, who until then had silently observed the scene.
The child broke away from Gokudera and approached Tsuna saying "daddy".
Gokudera and Tsuna became crimson and didn't dare to look up.
"Mom and Dad," the child said, joining their hands.
"This lil guy figured out more in five seconds than you two did in three years" Yamamoto laughed, taking the baby in his arms and whispering to him, "let's leave Mom and Dad alone" going out of the room.