Kamasutra 4.2.49

4.2.49

parijane dākṣiṇyam. na cādhikam ātmānaṃ paśyet.

A woman who is disliked by her husband, and annoyed and distressed by his other wives, should associate with the wife who is liked most by her husband, and who serves him more than the others, and should teach her all the arts with which she is acquainted. She should act as the nurse of her husband’s children, and having gained over his friends to her side, should through them make him acquainted of her devotion to him. In religious ceremonies she should be a leader, as also in vows and fasts, and should not hold too good an opinion of herself. When her husband is lying on his bed, she should only go near him when it is agreeable to him, and should never rebuke him, or show obstinacy in any way. If her husband happens to quarrel with any of his other wives, she should reconcile them to each other, and if he desires to see any woman secretly, she should manage to bring about the meeting between them. She should moreover make herself acquainted with the weak points of her husband’s character, but always keep them secret, and on the whole behave herself in such a way as may lead him to look upon her as a good and devoted wife.