Mercury represents our communication style and intellectual processes. Strong aspects between your Mercury and your partner's planets and/or points favor communication and sharing ideas.
Mercury Square Midheaven
You are both likely to think differently about the handling of professional affairs. It is not a favorable combination for family or professional relationships. There are likely to be major differences of opinion. The Midheaven person may regard the Mercury person as indecisive or unreliable where important responsibilities are concerned. The Mercury person may disagree with the Midheaven persons handling of domestic affairs. Communication needs to occur where these difficulties arise in order to sustain the relationship. If an understanding is reached between one another differences in the home can be worked through.