[the_answers]

In the bedroom early on, Gina says Dex and Charlie are having a "showmance".

When Dex and Charlie are in the garden, Gina is with Sam in the treehouse.

At some point Sam asks "Is Dex using Charlie ?"
Gina says no !!!

When Dex and Charlie go "deeper", Dex says to Charlie:

"And keep getting knocked back !"

At 0:16 Gina put's her hand over her mouth like she's shocked at hearing this supposed NEW news about Charlie !
http://www.youtube.com/watch?v=HNU6HsDl8nk

Before WHISPERING to Sam "why am I getting knocked back ?" (turn up the volume !), questioning Charlie's motives to Sam.

She later also has a joke with Sam about the confetti to make him warm to her more.

Later in the HL (not on the above vid) she says Charlie likes the attention. (which is true anyway !)
i.e. getting Sam more on HER side than Charlie's.

This is harmless tactical gamplaying and is a GOOD thing in BB IMO.

Gina is using her influence over Sam (who is also friends with Charlie) to cast doubt on Charlie but making her ally Dex (it's 2 v 3 !) look sincere.

Gina's played a great game many times before.
Love or loathe "playing the game", she shone brightly again tonight !