That shouldn’t have mattered according to the rules of caring for ones’ mother. The Jews had traditions that the surviving women were cared for by family members first. So, I still wonder why Jesus didn’t give her care to one of His brothers. It stumps me.
Who is our brother and sister and mother? Are they not our fellow brothers and sisters in faith in Christ? Who did Jesus love above all his brothers in faith? John the Beloved. He probably knew who would be best, no? They were together at His crucifixion, brother and mother.
When Mary and her other sons, Jesus’ brothers, came to visit Jesus He explicitly pointed to His disciples and said they were His mother and brothers. Matthew 12. Notice He does not say they are His father.