Thanks for the response. I admit, this is the first time I had ever considered that interpretation. I generally place the statement of Christ on the Cross to have more force than the volition of Mary.
Perhaps Christ directed his mother to observe her Son, i.e. Him on the Cross, and then He directed the head of the Household, John, to take Mary as his mother.
Joh 19:25-30
(25) Now there stood by the cross of Jesus his mother, and his mother’s sister, Mary the wife of Cleophas, and Mary Magdalene.
(26) When Jesus therefore saw his mother, and the disciple standing by, whom he loved, he saith unto his mother, Woman, behold thy son!
(27) Then saith he to the disciple, Behold thy mother! And from that hour that disciple took her unto his own home.
(28) After this, Jesus knowing that all things were now accomplished, that the scripture might be fulfilled, saith, I thirst.
(29) Now there was set a vessel full of vinegar: and they filled a spunge with vinegar, and put it upon hyssop, and put it to his mouth.
(30) When Jesus therefore had received the vinegar, he said, It is finished: and he bowed his head, and gave up the ghost.
John was a mere teenager at the time and had no "household". The original says "εις τα ιδια" -- "to his own"; the word "home" is not there.