[joeysteele]

I think Callum would love a chance with Charlie,he has gone about it in an odd way and it does come over rather inappropriate as to his actions at times but for him it may mean a lot more than to Dexter.

Dexter,I think has a genuine liking for Charlie but he does have a fixed opinion as to women and for him she would just likely be someone he could mark another notch up to.

However if either were to get close or things stay as they are then Callum would likely have no major communication with Charlie outside the house whereas I can see Dexter possibly even being seen as a friend by her outside.
She seems far more relaxed when in the company of Dexter than she is Callum though.