In "Message in a Bottle" by Nicholas Sparks, the message in the bottle is ultimately found by Theresa Osborne, a Boston newspaper columnist. She discovers the bottle during a vacation and becomes intrigued by the letter inside, which leads her on a journey to find its author, Garrett Blake. The story unfolds from there, focusing on themes of love, loss, and healing.
If you meant to ask if the message was found by Christy's mom or future wife, it's important to clarify that Christy is not a character in that narrative. Garrett's late wife is named Catherine, and he writes the letter to her.
If you have a different context in mind or need further details, please let me know!