Hera had spent a considerable amount of time and effort in cultivating a very specific facade that she wished to show the world. That included, frequently, members of her own family. There were many, many things that she kept from her children, as she assumed all mothers did. They were not friends, after all, but lives she had been responsible for shaping and nurturing. They did not need to know all of her personal secrets. Nor, no matter what he may think, did her husband. He, especially, did not need to know all that went on in her heart or her life. Particularly if it were something he could use to hurt her, deliberately or inadvertently. He did very well in that task as it was.
But her family saw more of her true self than the rest of the pantheon did. Oh, she knew very well what others thought of her, how they saw her. How those of other pantheons judged her, that was within her ken as well. Hera was hardly as self-absorbed as some might paint her, and she was well aware of the way others viewed her and her supposed attitude. She was aware, because it was what she wanted them to think. It was the reputation that she'd created for herself.( Not at first. )