Ichinisan
Lifer
I didn't read it as referring to the bastard kids at all.
implying that each of her three kids will be king/queen and die as such (gold crowns, gold shrouds)... obviously two of her children have already been crowned, one of which died as King; anything further is just prophecy speculation.
I think "gold crown" might also refer to their hair color, which distinguishes them from Robert's offspring.