Let me start of by explaining my situation first.
I am 23. 2 years ago, I moved from Europe to Florida to marry my DH, knowing he had a son from his last marriage. He is 6 years old now. I haven't met him yet, because he lives with his mother in a different state and she is making it very hard for my DH to see him. He didn't see his son for about 3 and a half years now. He calls him to talk to him on the phone, but that has been difficult as well because he can hardly understand him. I've been told my SS has Asperger syndrome. I've researched it a bit online, but don't quite understand exactly what it means. The biological mother is not helpful with the situation at all. Most of the times she doesn't even pick up the phone when my DH is calling to talk to his son. She seems to have a pattern of hooking up with men and having kids with them, which she did to another man after my DH, and she's with a new man again now. The only thing she wants from my husband is money, and even though he's paying her child support, she just keeps asking for more money. With this whole issue my DH is slowly giving up more and more on even trying to call her/his son.

This Summer we will finally have enough money to go get him though, once his Summer break starts. I am very nervous. I have a lot of fears about the whole situation. My DH is going to be able to take a week off of work when his son first arrives here, but for the rest of the Summer I will be the one that will have to take care of him practically 24/7, since my DH usually works 12pm-10pm or so, and wakes up at 11am, just before work.
I am a child of divorced parents and I remember not liking any of my mother's new "friends" and looking at them as intruders. I am so afraid of that happening to me, now.
The thing that worries me most is that over the phone, his bio mother taught the kid to call my DH by his first name. I don't even know if he remembers him as his father. Once she mentioned to my DH not to call himself 'daddy', not to confuse him, because the man she's been with is the one my SS is calling daddy.
I don't know how my SS is going to react, going to a different state, to be with a man who is his father, that he hasn't seen for 3 and a half years, and me, a woman he's never seen in his life, that he is going to have to spend most of those 2-3 months here.

I am sorry if this post is not written well. I have so much going on in my head for the past few weeks and I don't seem to be too good in writing it down. I hope someone who has been in a similar situation can help me somehow. Thank you.