Unfortunately, the processing times for I-485 is about 21 months, with approved I-140, for Dallas, TX. It appears there is some more waiting....

More information is required about your pending case for a complete a complete answer.

It may take longer to approve the I-130

You cannot under the two scenarios.

Yes, it is possible to pursue two parallel approaches as in your case.

Yes, she could apply for an OPT and use it to stay in the U.S while married then apply for a green card later.

The son if out of status cannot adjust.

In this case, NVC will return the I-130 to USCIS.

No. You are late, but that should be of no concern.

Yes, you can register for the DV lottery in 2023.