Sami revealed his infidelity to Layla.

Day after day the tabloids titillated the public with lurid details about the president's marital infidelity.

Yanni needs to protect his marriage from infidelity.

Sami forgave Layla for her infidelity.

Sami has just been told of Layla's infidelity.

What's a bit of infidelity between friends?

She's warning me about his infidelity.

Sami can't forgive Layla's infidelity.

Yanni is an infidelity counselor.

She never forgave him the infidelity and held it over him every chance that she got.