I recently called CPS regarding my ex-husbands relationship w/our son who is 12. I believe our son ma be in danger. CPS has to conduct an interview w/my son before visiting the ex's house. I'm not sure what to tell our son about why/who cps is and why are they speaking w/him. I want to be homest w/him but don't want to scare him or have him tip off my ex by mentioning it.