I was just curious if there is anyone..who has kids from a previous relationship and is having a child with a new SO. I kinda want someone to talk to about it.

I have two kids with my ex fiance. And he is very active in their lives. I am nervous about telling him I have Another baby on the way with my new fiance. My ex and split up because he was emotionally abusive and we fought constantly. My new fiance is as perfect as any man can be. =] so I'm in a great relationship..my kids love him. And everything is good. I'm afraid of what he might do (take kids from me, stop paying child support..ect.) Does anyone else feel or have felt this way?