 Father Robert Whitty, S.J., leader of the Jesuits in Great Britain, was her brother.Whitty joined Catherine McAuley, the founder of the Sisters of Mercy, at the convent in Baggot Street, Dublin, in 1839.Serving as Whitty's spiritual guide through her novitiate, Catherine McAuley was extremely close to her and requested Mother Vincent to sit by her side in her dying hours.