"Participated in the occult’ how? A Ouiji board? Gone to a tarot reading a few times? Was she even aware that the above are wrong? (IOW, might any sins she committed have been venial, considering her age, lack of instruction, etc.?) Look, normally I’m so rigid that boards look like spaghetti next to me, but in this case, I’d advise you to let your sister receive and hope that as she goes more often she will get to know others, especially the priest, and let things go from there. Have you considered getting her something like a beautiful rosary, maybe a CD of Catholic music, a poster, holy cards, etc? (Especially if YOU have these things yourself and use them, then it comes across as sisterly sharing of gifts). Cultivating a devotion yourself to a particular saint, learning about the saint, talking about him or her? Sharing some of your own struggles and wishes so she knows you’re not ‘talking down from the righteous position’ but instead holding out your hands alongside her as you both try to walk the path of righteousness? Emphasizing some of the ‘positives’ as opposed to the negatives, sharing some of the ‘funny’ saint and authors’ quotes, like Hilaire Belloc’s, “Wherever the Catholic sun doth shine, there’s always laughter and good red wine, at least I’ve always found it so, Benedicamus Domino”, and some of St. Theresa of Avila, who famously said, “Lord if this is the way you treat your friends, no wonder you have so few of them”. Making the faith more into the "Look at the beauty we have, the art, the music, the candles, flowers, poetry, laughter, sharing, companionship, stories, prayers, sacramental, etc’ gives her ‘the rest of the story’.
