Who is an SSPX Sister?

Founded in 1974 when the first Sister received the religious habit, the Congregation of Sisters of the Society of Saint Pius X was established to facilitate the apostolate of the priests of the Society of Saint Pius X. The founders, Archbishop Marcel Lefebvre and Mother Marie-Gabriel Lefebvre, his sister, were both missionaries in the Congregation of the Holy Ghost.

See more at https://sspx.org/en/sspx-sisters-founded-assist-and-pray-priesthood