He did NOT obey her at Cana. She didn't tell Him to do a thing.
Nor did He address her as *Mother* at the cross. He called her *Woman*.
John 19:25-27 Standing by the cross of Jesus were his mother and his mother’s sister, Mary the wife of Clopas, and Mary of Magdala. When Jesus saw his mother and the disciple there whom he loved, he said to his mother, “Woman, behold, your son.”
Then he said to the disciple, “Behold, your mother.” And from that hour the disciple took her into his home.
You'll need to try again to convince anyone of your claims.
Oh, and FWIW, here's the source.
United States Conference of Catholic Bishops
They're your guys.
http://www.usccb.org/bible/john/19
And if that's not good enough for you, there's this from The Douay-Rheims
http://biblehub.com/john/19-26.htm
When Jesus therefore had seen his mother and the disciple standing whom he loved, he saith to his mother: Woman, behold thy son.
She didn't have to. And He did perform his first miracle for Her.
If he repeats it again it’ll be a lie; previously exposed.