Contradiction with Matthew 8:14
Matthew 8:14 states that Peter's mother-in-law was healed in Peter's house, while Luke 4:38 implies that she was in Simon's house, creating inconsistency regarding whose house it was.
Matthew 8:14: And when Jesus was come into Peter's house, he saw his wife's mother laid, and sick of a fever.
Contradiction with Mark 1:30
Mark 1:30 mentions that Simon’s (Peter's) mother-in-law lay sick with a fever in Simon's house, similar to Luke 4:38, but focuses on Simon and Andrew instead of specifically highlighting Peter, illustrating differing emphasis in narratives.
Mark 1:30: But Simon's wife's mother lay sick of a fever, and anon they tell him of her.