Plagiarised from Margaret:
"Is there sin in Heaven? What about the fallen angels?"
(Or something like that).

Since my flood of oxytocin has not yet subsided I'll let someone else take the prize for getting the answer.

Okay, I'll play.

Is there sin in heaven?

No.

Fallen angels?

In hell.

Next.

Btw, who the heck is Margaret? And why is she worth plagiarising? That ought to provoke some comment from you, OldD.

Margaret is someone who posted that on another forum.
I thought it interesting as it provokes lots of other interesting questions, like:

Were the Fallen Angels in Heaven when they sinned?

Where is Heaven?

Where is Hell?

Next!

Ah, have I provoked YOU at last, Old?


Were the Fallen Angels in Heaven when they sinned?
No, they did not have the Beatific Vision. After the sin of the fallen angels, the good angels were rewarded with heaven.

Where is Heaven?
Where souls are blessed with the Beatific Vision. And some more.

Where is Hell?
Where souls are deprived of the Beatific Vision. And some more.

That last answer could explain why some see life on earth as hell...