This is what you attributed as a direct quote:
“Mary is on the cross with Christ helping Christ to redeem His sheep”
If you are purporting it to be a factual teaching of the Church it is up to YOU to provide proof of it.
I have also linked you to soon-to-be-sainted Padre Pio's idiotic rantings about a hundred times. For the sake of clarity, HERE IT IS AGAIN...
"...according to the teaching of St. Pio of Pietrelcina, we should be eternally grateful to "our dear Coredemptrix" and to our "Mediatrix and Dispensatrix of all graces.""
And of course, there are the words of your pope as outlined in this piece by a Roman Catholic scholar...
The Pope's new apostolic letter "Rosarium Virginis Mariae" (The Rosary of the Virgin Mary) has rekindled interest in Our Lady's role in the life of Christ and in salvation history. Mark Miravalle, a leading proponent for having Mary declared Co-redemptrix, offered his views with ZENIT. Miravalle is professor of theology and Mariology at Franciscan University of Steubenville and president of Vox Populi Mariae Mediatrici...
This is what the majority of Roman Catholics believe. Where are they learning this? Are they learning lies? Who are their teachers if not the Roman Catholic church and its representatives?
I've also posted links to the RCC catechism which use these same words and images which is obviously why these Roman Catholics feel free to repeat this theory of Mary as co-redeemer and dispensatrix of all graces as fact.
They hold a lie in their right hand.