30 is not really that young to be having a new baby unless 30 is the new 20. As you know since you have a 12 yr old already. Some people cannot handle responsability. I have a few choice words for him myself. It's one thing to be freaking out a bit.... an another to be doing what he is doing especially while you are due with his baby.

I am terribly sorry that you have to deal with this. It's not fair and I know how painful it is. Whatever his excuse is you have to decide what is best for you and your baby and your son. It's not fair to your son either. I hope you have good support and can get through this hard time. My heart goes out to you ...

Try to make sure you take care of you right now. I do agree with KathyOlivia as hard as it might be, it might be in your best interest to play strong. For your own benefit.

It sounds like selfishness to me and don't know what the cure for that is. Even if your are having problems this is not how you go about resolving them when you have a wife a son and baby on the way. You don't put three people out and create turmoil to have some free time.

Maybe some counselling will help, and if he wouldn't go it may still help you to get through this.