input: [Reference] Matthew 8:14-15 [Miracles of the Lord] Peter's mother-in-law was healed. [Who Demonstrated Faith] 
output: The scripture does not mention much detail on this story, but it is safe to say that Peter, his wife, and his mother-in-law showed faith. Matthew does mention that after her fever left her she immediately started to minister to Jesus and those in the house. This to me shows her faith that her fever was cure because of the Savior.