Why does a mother treat her only daughter harshly and curse her, especially regarding marriage, while treating her brothers with kindness?

A mother does not have the right to supplicate against her child, curse him, or hit him. The son has no fear from his mother's supplication against him as long as he is dutiful to her. It is probable that the cause of the mother's actions is her intense love and fear for her son. It is advised to be patient and strive in being dutiful to the mother and showing kindness to her.