A lot of these things kind of parallel one another.

A job may consist of many tasks that may be defined with parallel or serial relationships between the tasks.

So we exist, two parallel relationships, each running their own course, with no need for intersection or conflict.

However, their own infidelity is irrelevant to them, and they view love affairs with other women as a possible parallel relationship to their steady relationship.

However, their own unfaithfulness is of no importance to them, and they regard love affairs with other women as potential parallel relationships along with their marriage bonds.

Contrary to bigamous/polygamous relationships, where one person has a sexual relationship with multiple partners, polyamory denotes a relationship in which all partners have sexual relations with one another.