Rommies fuck together in front of a scientist for a study!

When Casey Calvert arrives and announces that she'll be the one conducting the study, Eliza and Whitney are ready to go! But then they get the shock of a lifetime when Casey asks if they're lesbians, revealing that they need to be a lesbian couple in order to participate. They are even MORE shocked when Casey also announces that they'll even need to have sex as part of the study!