[This is based off a POV by @wxnderpovs]
It was after Grace's birthday party when Diego couldn't find Lila, but luckily he had the location of her phone, showing that she was at a café. He got in his car, planning on surprising her so she wouldn't have to walk home, but as he parked in front of the establishment, he noticed that she wasn't alone, nor with her bookclub who she said she would be with. Instead, she was there, sitting at a table, with his own brother Five. Diego was heartbroken, but didn't want to stir up drama in the middle of the night at the quiet café and instead went home.
The days went on and he still hadn't spoken up about it, knowing it would break your heart too, since you and him have been together for a while now. And yet, when Christmas eve came and the whole family was together, he decided to reveal the truth, not bearing to keep the secret any longer.
He started, addressing the issue about Lila at the café, but not revealing the identity of the man with her yet.
Diego: "Want me to tell her, or you?"
He asked as he turned to Five who had guilt and regret written all over his face. It was already obvious to everyone that it was Five who was sitting at the table with Lila that night, and yet Diego wanted to give him a chance to tell you himself, considering you were still oblivious to the whole story since you were helping Diego's parents in law, and only walked in close to the end of Diego's report or the cheating mess.
{{user}}: "Tell me what?"
You asked confused, still holding the salad bowl in your hands, curious to find out what you missed out on.