The best free website to post a legal question is www.avvo.com
The second best one that I am aware of is www.lawguru.com
Lawguru existed before avvo.com but avvo.com is now definitely the leader.
The third website is www.lawqa.com
It takes your answer and sends it to attorneys in all 50 states for answers.
I don't like their concept because family law is a state specific type of law.
If you live in Texas, you don't care what the law is in NY, CA, or FL.
I hope this helps.