Ey? That's not normal at all. The fight should start with her incapacitated by status effects, so you use the Context action 'Breakout'. I'm not sure what you mean by unequipping her weapons, that is not required at all and shouldn't have affected anything other than nerfing her damage.
i went into the fight with both weapons equipped, i could do nothing but surrender as the other two options did nothing, so after reloading to the auto save that happens before the fight, i unequipped her weapons and was able to punch until i got free