Can I sue to get my brother from adoptive care? Does the civil court have jurisdiction to overturn another family court judge?

Sounds like an awful situation. To answer your two questions in the title... I am fairly confident the answer is no and no especially if this...

Do I have to have an attorney to adopt an adult

You don't need an attorney, but you would be better off getting one. The good thing is that an adult adoption is about the least expensive...

Not sure about MI, but there is no waiting period in IN for a stepparent adoption.

Will signing my parental rights away effect any future adoptions I may do?

It shouldn't. But if the adoption of your fiancé's children becomes contested by their other parent maybe they could use your letting your...

Can I reverse a adoption . or voluntary release my parental rights of a adopted child

Since you are her parent the only way to "get out" of this situation would be to have someone else adopt her... maybe your sister.

My wife has adopted my daughter. My daughters biological maternal grandfather wants court ordered overnights. Is there a case?

The likelihood of the grandparent prevailing at court is very low.

She can appeal any order from the court if she does so within 30 days of the judge issues the order. She should hire an attorney to help her.

Is there a document, or can someone right one, that my ex can simply sign to have step-father adopt my son??

It takes much more to have an adoption granted than just having a legal father sign a consent to adoption. There are things like putative father...

Can my husband adopt the older two children?

Indiana Code 31-19-9-8 sets forth the 12 different grounds for when a parent's consent to an adoption is not required. The top 4 that are...