Gomer was a woman in a story from a long time ago. She was married to a man named Hosea, who was a prophet. A prophet is someone who talks to God and tells people what God wants them to do.
But Gomer wasn't a very good wife. She cheated on Hosea and left him. This made Hosea very sad, because he loved her and wanted her to be happy.
But even though Gomer left him, Hosea still loved her. He forgave her and took her back. He showed her that even though she made a mistake, he still loved her and cared for her.
And that's the story of Gomer and Hosea. It's like when you do something bad and your mommy or daddy gets mad, but then they forgive you and still love you because they care about you.