Possible Clues:

• Rest ran off, incorporated in first such as 18 and his lady
• Cohorts
• Besties who might get in trouble together
• Bonnie and Clyde, infamously
• Couple getting away together?
• Future co-defendants
• Pair of sneakers?
• Bigamist's wives?
• Bonnie and Clyde, e.g.
• Essential factors in fencing, perhaps