The translation of the novel is a bit different but….cecil told chase he is dressing like a girl because Josh likes it (prolly cecil is also crazy over his dad like chase haha)
In the epilogue, but to get the full picture you have to read a side story of Kiss me liar that wasn't adapted to manhwa, yet. In this side story Yeonwoo visits Josh and brings Spence along, their children meet for the first time. There you find out that Josh likes to dress Cecil in cute things and Spence thinks he is a girl.... .the result of the joined effords of Josh and Spence you see in the manhwa adapted side stories of Kiss me liar....
do we know why cecil dresses like a girl???