What if you have a child together?

People cannot just be "kicked" out of a home. There is an eviction process that needs to occur. Please speak to counsel.

Can my grandsons father file for visitation for visititation for my grandson to see his (half) sister?

It sounds complicated. You really need to speak to counsel to discuss what options if any you have.

Is it a reality that, I, as a grandmother, can get legal visitation to see my grandchildren.?

Grandparents have rights in NY, but they are very very limited. I would strongly suggest that you speak to counsel about your case, circumstances...

How can I switch Residential Custody over to me?

There are many factors that you are not mentioning. You really need to speak to an attorney in the state in which your son has lived in for the...

Am I violating court order if my son refers to my husband as step-dad?

I think you are following the order, and by him calling him step dad, it is clear that he is not the father.

Can I go to jail for this harassment this person file against me?

I'm not sure that this rises to the degree of harassment or criminality.

Can the Executor of the Estate sell our family home without the other siblings signature?

As counsel said, you really need to contact an attorney and get to the bottom of what is really going on. There seems to be allot of details to...

What can I do?

If there is a violation of the Order she can call the police. I would just be mindful of everyone. I am sorry it is such a mess.

Yes, there will need to be a court appearance.

Allowing a small child to watch, play adult material considered child abuse? what reliefs can I ask in court?

Although one may question his judgement, it does not appear based on the fact pattern that you have laid out, that this constitutes abuse.