Mia slept with Harper in college to get back at Lance for his numerous infidelities.
Mia's Motivation: Retaliation for Infidelity
Mia's decision to sleep with Harper stemmed from a desire for revenge. During their college years, Lance had been repeatedly unfaithful, leading Mia to seek a way to retaliate against his numerous transgressions. Her encounter with Harper was a direct consequence of this desire to "get back at" Lance.
The Revelation
The truth about Mia and Harper's past encounter came to light when Lance discovered a book in Harper's coat. Upon reading it, he uncovered the details of Mia's infidelity with Harper, realizing it was a direct response to his own history of unfaithfulness. This revelation played a significant role in the unfolding narrative of The Best Man (1999 film).
Context of the Event
The event occurred during their college days, setting the stage for long-standing emotional repercussions that would later surface. This act of retaliation highlights a complex relationship dynamic, deeply rooted in issues of trust and betrayal, which continued to affect the characters involved years later.
