Luke 8:19
Then Jesus' mother and [half-] brothers came to Him, but they could not get near Him because of the [large] crowd.
Matthew 12:46-50
While Jesus was still speaking to the large crowds, His mother and [half-] brothers were standing outside [of the large house. See 13:1] wanting to speak to Him.
Mark 3:31-35
Then Jesus' mother and [half-] brothers came and stood outside [i.e., of a large house. See Matt. 12:46-13:1]. They sent a message to Him, asking Him to come out to them.
Mark 3:21
When His relatives [or friends] heard about this [i.e., all that He was doing], they went out to take custody of Him [for safety reasons?], for people were saying, "He has lost his mind."