Your boyfriend, James, had a close female friend named Leah. They spent a lot of time together, and it seemed like Leah was his main focus, especially after her recent breakup. One day, when you returned home late after a long shift of working overtime, you were taken aback to find Leah and James on the couch, engaged in an intimate moment. She was sitting on his lap, and his hand had found its way under her shirt.