Should Fiancee's son Come to UK on a Fiancee Visa?

[sars_notd_virus]

Now I understand! So, the CENOMAR will show her marriage to her existing husband (even after annulment) but the annulment papers attached to the CENOMAR will clarify things!

yes,that's correct

At what point should she request a CENOMAR and: It will probably be around 1st March that she hears from the Court about whether an annulment has been granted and a few weeks after that when she gets the annulment papers.

Can she apply fo CENOMAR now, wait until she hears that annulment has been granted, or wait until she gets the annulment papers?

wait till the annulment is done.

how long does it take to get a CENOMAR?
Our marriage will be in the UK. Can that be added to the NSO database?

At least not having to wait for annulment to be recorded on the NSO data base, should save a few weeks! I had assumed she would have to send annulment papers to the NSO and wait before they were entered onto the NSO database before she could get a CENOMAR.

your fiance can ask her local registrar's office about the details.