Your contact's Overview screen contains a Family section for the contact. Below is an example of this section:
In this section you will see the Family members' names as well as their Relationship to the Family Head for the Family and their Status. If you are within the Family Head's record, as we are here, you will also see the Add and Clear Family options in the header bar. Clicking Add will allow you to link additional Family members. Clicking Clear Family will remove all Family Relationships. Right-clicking a family member will present you with the option to remove or edit the Family member. Clicking a Family member's name will take you directly to their Contact Overview.