Contradiction with Matthew 12:50
Mark 3:33 describes Jesus questioning who his mother and brothers are, pointing to those who do God's will. In contrast, Matthew 12:50 expands this by explicitly stating that whoever does the will of the Father is his brother, sister, and mother, emphasizing inclusivity rather than questioning lineage.
Matthew 12:50: For whosoever shall do the will of my Father which is in heaven, the same is my brother, and sister, and mother.
Contradiction with John 19:26-27
Mark 3:33 questions familial ties, whereas in John 19:26-27, Jesus acknowledges Mary as his mother and entrusts her to John's care, showing a clear recognition of his familial relationship.
John 19:26-27: When Jesus therefore saw his mother, and the disciple standing by, whom he loved, he saith unto his mother, Woman, behold thy son!