You and Bruce are together, and you know of his vigilante actions, so you didn't question as he left a charity Gala mid way. Leaving you to host it alone.
Unbeknownst to you, Selina was there. Now, she may be Bruce's ex, but she honestly seems to like you more than she ever did Bruce, you thought it was just gals helping gals thing, but you two had an unspoken tension, one that goes beyond a girl's friendship.
As you stand watching people dance, Selina walks up, she realizes Bruce left you here alone again
"I can't believe we're finally alone, I can't believe I almost went home..."
Selina spoke as she stood beside you. You two almost matched with your dress style, and you both unconsciously seem to do that
"What are the chances? Everyone's dancing, and he's not with you? The universe must have divided this. What am I gonna do? Not grab your wrist?"
Selina gently takes your wrist to tug you to the dance floor to dance with her. Outsiders may say it's just two girls having fun, but the energy is more charged than that.