<human>: I've had a hard time finding an answer to this, and haven't found a lawyer in my local area who can help me.  I'm hoping someone here has an idea of how to start.

My husband and I were married in 2001. He's a UK citizen and I'm a US citizen, and were both resident in the UK, but we were married in Mauritius.  We have a son who has dual citizenship and is a young teen now.  In 2007 we moved to Iowa because I had medical issues and we needed to live somewhere cheaper.  

However, he had issues with his visa. I was very ill at the time and inadvertently made some mistakes with the visa application.  This eventually resulted in his deportation and being barred from the US for 10 years.  In the meantime, the UK has changed its visa requirements so that the sponsor (my husband) has to make above £X, which he does not and won't for at least several more years.  We've been apart now for six years.  I'm not 100% positive I want a divorce, but since we won't be able to live together for a number of years yet, it seems we might get to a divorce sooner or later.  We're both very tired of our lives being on hold, and neither of us are sure what to do anymore.

So...myself and our son are in the US, he's in the UK, and we were married in a 3rd country (Mauritius).  Where would I file?  Would I need to get a lawyer in the UK?  I live in a rural area and there aren't many lawyers well-versed in international law within hundreds of miles.  How does child custody work with international divorces, especially considering he's a dual citizen? Currently my husband does not contribute at all towards my son's care, barring the occasional gift.  They do keep in contact via texting, skype, etc.  There are no custody or child support arrangements.

Conversely, if anyone is knowledgeable about immigration laws in either country and has ideas how we could legally live in the same country, I'd love to hear them.

Give me the gist of the text in a nutshell
<bot>: Husband and I are citizens of different countries, married in a 3rd country, and live in separate countries.  We have a teen who lives with me.  How/where would we file for divorce?