Rousey is BIGGER than Cyborg and her first at 135 was against Tate( for the belt!!! even if she never fought in that division, some would think that Ronda slept with somebody to pull it of) and for her second fight she literally had to starve herself to make weigh.
She always fought at 145 and kept her dirty mouth shut before Cyborg pissed hot. Now that she's found a way to duck Cyborg she pretends that Cyborg is afraid of her which is nonsense, not everybody can have the Dolce diet.
Still probably would have happened if it wasnt for Ortiz. Cyborg said she would be willing to make the weight.