life insurance futures

If I get my son the beneficiary of my life insurance, my husband may also have access to money, if he survives me?
I am concerned that if I called my husband as the beneficiary, his ex-wife will be able to access my life insurance money due to a peculiar law that says we must claim "non significant revenue producer of Heritage" as the figure of his child support obligation. $ 400,000 in cash in the bank would qualify as a major asset. This money is intended to secure the financial future of my family should die, not hers. My hope is that I can leave everything to my son and my husband may use to pay living expenses until he turns 18. Does anyone know if my husband has problems accessing the money provided for everything you needed?
In fact, consult and attorney and tell her wishes and her whole story. If your child (your desired recipient) is less than 18 years and dies, the court allowed to take custody of such a large amount of money. It would appoint someone to oversee these funds (most likely her husband (father son), but maybe not). If you take action now, while you are alive, and then take decisions not in court. You will be able to change these later decisions, as when his son becomes 18 or finish college.
Life Insurance Protects New Mother & Baby – realLIFEstories