My mother is US Citizen. I am a married lady over 21. How long would take for her petition me and family be approved?

Unfortunately, it does take a long time since you are married over 21 years old. It will indeed take about 12 years for the process to be completed.

Whats better for my case the right of asylum or Reunion

It will take at least 10 years to obtain an immigrant visa via reunion. If you have sufficient supporting evidence for Asylum, it would be...

My father applied for my I130 and it was approved with priorty date Apr 2011

It takes a long time when the Petitioner- father is not a US citizen. Hang in there.

My husband is in a prison and has a hold for inmagration could it be removed.

More information is needed to answer your question.

Is there any possible way for my illegal husband to get a visa without leaving the u.s?

He could apply for a waiver but they are very difficult to obtain.

Can I obtain US citizenship while being a green card holder and working in another country?

There might be an exception to the residency requirement if the company is a Us based company. Otherwise, you must be in the US.

Household size in I864 affidavit of support.

Everyone who lives in your house must be included. If your husband income is not sufficient, consider co-sponsorship.

Typically when someone files for child support they are not asked to disclose their immigration status.

Why would they reopen an approved 601 waiver

Did you withold any information that would negatively impact your case?

Planning divorce filing on 485 RFE response pending of dependent.

You should consult an attorney to get answers to all your questions.