I've had very similar, but minus the "conflict with DH" part.
On the one hand, since our finances are pooled, what's his is mine and what's mine is his - that's only fair. Luckily he agreed with the re-distribution and it's been done with minimal fuss - except of course on the part of the two recipients, who were deeply touched.
The point is, that the additional amount they received was, while not huge, life-changing for each of them. It got one of them out of debt, and allowed the other to leave her controlling spouse.
I don't think I'll ever regret doing it. It has brought us closer, too, because I can seem quite a cold fish outwardly, and now they can, I hope, never doubt my feelings towards them.
Yes I have two grown-up children who theoretically lose out a bit, but I don't worry about their prospects - touch wood, they are largely sorted, and careful with money.
I think if my mother left the money to me, it was to do with as I wished, including re-distribute according to need.