Yeah, this is something I am eager to know - I plan on doing my first official(/unofficial) Dynasty (as a parody Dynasty which is a reverse of Metro's Man Dynasty, it'll have lots of cute girls who shackle guys to them, and lots of bright pastel puke-worthy colors
) and I was going to do the same thing Metro did - marry in a rich guy, have him die of old age(I learned my lesson with my dry run about having Surrounded by Family as the founder's LTW) and then she'll stalk and capture one a younger man(probably Lincoln Baker, who'll be old enough to marry when DeAndres dies - this is in Twinbrook) and I was worried that DeAndres will sculpt my founder's ice visages and then they'll melt to puddles when Grimmy takes him away!
Of course, my founder will super max Sculpting too, but I don't think her Ice Personality trait will cover her own Ice sims.
I'll just fling ahead and hope for the best since 60% of the people say their ice Sims didn't melt after the sculptor's death.