Romanov – Well, excuse me if I am wrong, but what the dream tells is that your sister has often accused you of not cleaning up enough – obviously it is the sister inside you that is critical, the sister of your accumulated memories.
Your dream of course exaggerates somewhat to get the message over. The cockroach between the toes says that you are not aware of the mess until she screams at you. Then you see the space between you is a real mess.
So it might be saying that you need to be aware of the many old messes that exist between you and it would be wise to see if this can be changed. I am not sure if old messes mean past arguments, difficult feelings, or sibling things.
Tony