Abuse committed in home of parishioners, appeal dismissed, Assault, Assistant priest appointed to Diocese, Assistant priest not an employee or independent contractor of Diocese, personal injury, vicarious liability, Whether abuse sufficiently connected with the role and functions of assistant priest so as to be the occasion for the abuse, Whether Diocese vicariously liable for sexual abuse by assistant priest of five year old son of parishioners, Whether principle of vicarious liability may apply to relationship between Diocese and assistant priest