Friend Or Ex-Girlfriend?

Coming back to the couple who forgot about their respective best friends...

When Xiu asked, 'Who's Cali?', at first, Darren didn't notice her tone. It seemed like a very casual question to him. Perhaps, because he had never been questioned like that ever by anyone.

So, his casual reply was, "Cali's a friend."

Xiu turned her face slightly towards him and tried keeping her voice leveled and devoid of any jealousy as she asked, "Friend or ex-girlfriend?" 

Now, Darren noticed the change in her voice and laughed to himself as he said, "Sweets, I might have dated a lot but Cali could never be one of my ex's."

"Why not?" inquired Xiu curiously.

Darren turned her body to face him and held her face in his own making her look at him and said, "Sweets, Cali's been more like a bro than a girl to me. Not just me, actually, she's been like that to everyone. She's been a tomboy for as long as I can remember."