If your ex were to file papers with the Court stating that you have constrictors capable of killing your son and she is fearful of him going to your home, all it would take would be a Judge that has no real knowledge of snakes that gets info about them from television and you could easily end up with a Court order for you to have all visits with your son away from your home.
Also, IMO you would be making a terrible mistake in inviting State investigators into your home, whose only function is to look for and find things that are wrong with a home environment.
You better tiptoe around this issue.