[Marsh.]

To be fair, out of those 3 I think we've seen everything to come from Gina. Her money, her spoilt little rich girl act, she's had a few arguments. Maybe she should be let go, we've not seen that much from Dexter to be honest and Sallie has other things going on with the other housemates to still develop through the series (which is what happens when she forces herself into the middle of everything).

Whereas I don't see Gina doing anything much different to what we've seen.