Sounds correct to me. There may be a tax on the transfer of funds into the country. Confirm the event and remedies prior to doing anything.

Yes. The remainder of this response is written to meet word count requirements.

Such litigation is long and expensive. Unless you have good reason to believe you will succeed I would seriously consider the offer with counsel...

Can I sue my husband's mistress/ now gf for intentional inflicting emotional distress?

Such litigation rarely succeeds. Seek out a local attorney to confirm my suspicions.

I'm the only one listed on my childs birth certificate. Now he won't return her is it kidnapping?

Until there is a parenting plan in place the certificate controls however you have liability in the case if the blood test confirms his parentage.

What should I do?

You should hire counsel and seek to amicably resolve the issue in that you have liability

Sure. Mistakes are made all the time.

An ex has explicit material of us and has shared it with someone and threatened to post it on social media, what can I do?

Unless the materials were obtained without your permission and without notice to you there is little you can do

Do I need to notify IRS that I permanently emigrated?

Yes. All taxpayers should provide accurate residence information but especially those who are not citizens.

I’m going to defer to my CA colleagues on this one but any document signed by a minor should receive higher scrutiny.