C45 Let Me Explain Myself

The footage clearly showed how Debby walked out of the exact room he had a night stand. So how did Edna come into the picture? It was definitely Debby he had a night stand with. He mentally cursed himself for not believing all these while that Debby is her was the woman he had a one night stand with five years ago. That just give an accurate explanation behind how Fred turned out to be his son