Native Meditation

Is it wrong for me to want to assist my roommate with meditation? She recently received a CD of Native American instrumental/meditation music, and is considering buying Lakota Sweat Lodge Cards. She is herself part Native, Oglala Lakota-Sioux to be more precise, so I guess that's why I hesitate; I'm not native, and I don't want to feel/appear to be getting into all that nasty cultural appropriation business. Thoughts?