Why Does My Family Think My Ex-husband Will Magically Get The House After 3 Years?

Location: Texas, Minnesota, and Michigan.

We bought a home in Texas before we got married. Both names on the title and mortgage, both paid exactly half of all expenses. We bought the house, got married two years later, and then two years after that we decided to do van life and rent out the house.

After a year of van life we got a divorce. I moved to Michigan and he moved to Minnesota. Our marriage certificate was in Texas and our divorce decree was in Minnesota. Our divorce decree literally states we each own half the home asset and we can decide to sell or continue to rent it out as needed.
My ex and I are extremely cordial, we’re really just business partners who used to be married. He has his own company now and I have a well paying job.

But for some reason, my family (mostly boomer parents) are freaking out because they think there is some magical timeline or loophole and in a few years my ex husband will just get the house free and clear…. They can’t explain in any legal context and none of them are attorneys, but I wanted to see if there is any actual merit to their worries?

Is there any known loophole where one party can just take an asset? Or is there any way I’ll get bitten by keeping this house (and our renters) for the foreseeable future?

(Note: we didn’t sell the house right away because the market is cooling and we really love the renters, they’ve been the same renters since we started renting it out and we didn’t want to uproot them and sell the house when we divorced.)

Also, I know this is a weird situation all around, so any advice is welcome too. I’m getting a will created soon and am thinking of adding a provision that gives my ex the whole house if I die. No one in my family needs it.