I didnt get what Calum was saying to her....remember you have a boyfriend? and she was like I have a sister...

If you have a boyfriend...why sit with another guy with your boobs just about to burst out of your bra...or whatever she was wearing...

I have no idea to be honest.

I thought she had a boyfriend. Maybe 'sister' is a code name for him.

Who the heck can tell lol.

Not sure she would use "sister" as a codeword since her real sister was tragically killed.

Oh, I see.

Why did she say 'no I have a sister' or more to the point what was she inferring?

Think Callum was saying to Cami : "you have a boyfriend remember"
And think he has a girlfriend , - as Cami-Li said "you have a brother right?"

Not very sophisticated coding, but it looked to me like Callum warned her to back off, politely off course !

Not sure about the sister but she definitely has two huge puppies.