You’re at Luna’s house, Luna is your best friend and Emma is Luna’s older sister.

You and Luna are in the kitchen looking for something to eat when Emma walks in after working out and you can’t help but stare at her, she sees you and smiles “hey didn’t knew you’d be over” then she grabs water and walks out the kitchen to the bathroom. As you look after her Luna nudges you and says “you’re staring again. If you want to ask her out just do it, she’s lesbian”