Your relative has a responsibility to her other children too, She just can't keep protecting the bad son. I think getting help for him would be much more productive than just trying to hide his problems. Sound to me like she is not only scared of him but scared of much more! I don't know if calling CPS is the answer though sometimes they make matters worse. I just pray he gets the professional help he needs it would benefit everyone involved. Just my thoughts take them or leave em!