I am retiring and have a prenuptual agreement from 8 years ago?

Should I relook at it with my atty and my husband to be sure that my children receive my pension benefits if I die. My children are grown 27, 22, 21... however my husband will have his own retirement (He is an executive for at very large company). We are both in our second marriage, and agreed in the beginning that his money is his, and my money is mine. He does have his own checking account, and a real estate account that I don't have rights to and he's been buying and selling houses which I sign off on deeds (no questions asked). We also have a shared checking and savings (post marriage). I don't want to make a big mistake. My kids are already the beneficiary of my 401k. What do you think.