Virtually impossible.
God's kingom cannot be served with a divided heart.
How can you worship God and satan at the same time?
You can't. Either your heart is for God, or the evil one.
Now, there are people who pretend to be "catholics" for appearance's sake, and are otherwise. I'm not sure why, but that is the way it is.
Psychic, curses, paganism, that all leads to witchcraft and the devil. I am not insulting you but it is.
The Holy Spirit will leave you if you practice these things.
EDIT: You just indicated that grams and mom could cast curses against people....... enough said. God will not help those who cast curses against people, meaning the curses that they cursed will not be lifted, unless the person is truly repenetant goes to Confession, and refrains from the dark arts.
EDIT II: Look at the mafia. They would go to church, make the Sign of the Cross, and go around killing families, wreaking havoc, and so much more. Is that a true Catholic? Is that what a Catholic is supposed to act like? Pleas think about it.