From the perspective of dream interpretation, you will have a further relationship with your mother-in-law, and dreams are mostly the opposite. This is because of our self-protection system. You are afraid that this will happen, so you instinctively avoid it. This looks good. But after a long time, there will still be shortcomings. You should learn to face yourself.
To sum up, the traditional Duke of Zhou in China is scientific. As an explanation, let me tell you about psychology first. The purpose is just to tell you and try to spy on your own world. It is flawed.