I cant really get her to believe what the Church teaches. How do I talk her back into Catholicism and prove to her reincarnation isnt real?
The body was never meant to be separated from the soul, but because of sin, death was brought into the world, and at the end of time we will be re-united with our bodies, which will be glorified and no longer subject to sin.
the body and soul are one with each other, although they can separate, they cannot be complete without each other, because that is just how God made us.
we were meant for God, we will only be happy with Him, reincarnation is an idea fabricated by those who are attached to this world and cannot imagine anything better…but God calls us to a higher existence, which we must seek out, this world is a temporary place of learning, we are here to learn to love God, but that must end, if the world goes on and on with no end in sight, then what is the purpose of living?
the purpose of life is to know, love, and serve God in this life, so that we may be happy with Him in the next, if your mother believes in reincarnation, then she does not believe in the purpose of life as taught by the church, nor does she believe in heaven or hell, nor the saints, nor Gods judgment, nor the passion of Christ, or in God Himself, reincarnation denies all these things, because without heaven as our final destination(or hell) then none of those things matter, because they lead to nothing, Christs passion and death are in vain, because by His death He opened the gates of heaven, but for who to enter in?
and likewise she denies the queen-ship of Mary, since reincarnation would mean that she did not enter heaven at her death, but was re-born,
well, the list goes on, but to sum it all up, reincarnation denies all Catholic teaching, if for nothing else, because it gives it no meaning.
but, to help you further, here are some much more extensive arguments refuting reincarnation, which i think you will find much more helpful -
pamphlets.org.au/australia/acts1717.html
catholicapologetics.info/apologetics/buddhism/reincarnation.htm
catholicapologetics.info/apologetics/buddhism/carnate.htm
catholicapologetics.info/apologetics/buddhism/incarnate.htm
hope that helps, take care.