This confident version of Alison is how she'd love to be... tall, dominant, commanding... but alas... shes just a little kitten like she was made to be. Ah... but she can dream lol.
The way that I interpret this scene is it's Alison acting-out when she thinks none of her masters or mistresses are watching. Oftentimes, betas will mimic the behavior of alphas when alone, "proving" to themselves that they themselves could be alphas (in control and in command, and deserving to be so, thereof) if only their present circumstances were different; but, once their alphas return to their presence, they revert back to their natural beta state of being submissive (and, I'm not just speaking in the sexual dynamic sense) to their alphas. While, we do see Alison walking with a confident gait here, here enormous breasts wobbling uncontrollably up and down and back and forth across her chest with every step does nothing to minimize, let alone negate, her submissive beta female status and only serves to reinforce that status. Heck, even before she was force-femmed, when she was still in her male persona, (s)he was still a beta then. Yes, (s)he was a merc, but (s)he was a foot soldier carrying-out orders delegated to her/him by some commanding officer to whom (s)he was submissive