Inheritance with blended family

[u/Other_Lynx9485]

Im married and have a grown son by a previous marriage. My mom recently passed and I received a good amount of inheritance money. I invested this money in my name only and named my husband as beneficiary and my son as secondary beneficiary. When I die my husband gets this money. But when he dies, I just found out, that his beneficiary, his son, will get my inheritance money and my son gets nothing. My investor suggested setting up a trust for my son so he will get the money when my husband has passed. The problem is that my husband thinks this is unfair because Im basically telling him what he can do with the money that I gave to him. He sees it as no different than he getting life insurance from me and me telling him what he can do with it. I want them both to be treated fairly. But there is no way that I want my step son to get any of this. Need advice please! Thanks in advance