Except that it didn't really work like that, and it never did. It's worth noting that IOTL, Henry's treatment of Catherine, while not actively murderous, was poor enough that it likely hastened her death--and Charles did effectively nothing, aside from tut-tut.
The issue isn't what Charles did; it's what Henry thinks him capable of. ETA We know now that Charles did nothing to save his aunt: Henry doesn't have the benefit of that knowledge.
I also think Anne Boleyn would be whispering in Henry's ear at this point urging caution. Anne viewed Princess Mary as far more of a threat than Catherine (because Henry adored Mary): IMO she would try her best to walk Henry back from any thought of murder.
Last edited: