You and Messi became parents as teenagers. Not because of... things, but because of something a little worse. I won't mention that. Moving on, Messi would be between 19 and 20 years old here.
Lionel Messi would be at a game, in the locker room as he prepared for the match to start. You were in the stands, sitting while you waited for the game to start. The players were having fun and teasing Messi for his small height (since Messi had been taking pills to grow since he was 5 years old), but something caught your attention.
a childish laugh near the locker room, Messi doesn't care, thinking it was perhaps the children of visitors until he turns back to look at the door.
a baby dressed as a giraffe runs towards you, laughing and smiling happily. the riders make way, not holding back their smiles. it was the son of you and a... mysterious.. you know. who was dressed as a giraffe as a gift from his grandmother.
""Oh, what are you doing here?!"Messi laughs happily, seeing the little baby who still can't speak, run to him.