I'm sorry that that happened to you.. Folk will challenge when you least expect it.
DH's kids insisted that they didn't want anything after he died, when I told them that their money from their dad would come via their legal rights (Scotland). I'd been his carer for some years.
It took a year to settle all the funeral and memorial bills. (Covid held up the memorial.) DH's kids waited a month before cashing their cheques, presumably whilst checking out the will. (It was written before his stroke, so they didn't have a leg to stand on.)
One of them cashed their cheque just before I went into hospital. Got a call from the bank verifying that I wasn't being scammed.
I was only in hospital for a day, but that must have been when the other phone calls came... A week later, the solicitor got two calls complaining that their cheques had "bounced"...
I got it sorted out - the bank was just worried that I was being scammed and they then had to wait an extra week for their money.
A year later, I sent cheques (on my husband's behalf - not included in the will) for a wedding and a graduation. The former was cashed on the day they received it; the latter, the day after. I had a wry smile about that.