A detective visited Wayne Manor. The man who took care of Bruce's summer house had committed suicide. Wayne admitted he'd not been there in ten years.
He went down to check on everything and ran into the man's son (his wife had died months before). He also ran into tons of memories. He found letters written to his father from another woman. He set out to find her. That night, he watched all their home videos to see if he could tell his father was "faking it" with his mother. He tracked down the woman, who still worked at the hospital. At a charity event, he cornered her and they talked. She asked if he'd found the letters. Thomas had given them to Martha - they'd never had an affair.