Say what now?

I'm going to get my husband's kids today. I haven't seen them since my husband left, since his x doesn't see any reason in driving them 1 1/2 hours just to see me (they live 3 hours away). I understand this, yet, my husband and I are really trying to instill in them that we are all a family, and if they're never here, how does that work? But right now, my main issue, my main fear, is that they don't know I'm pregnant. Yes, various people think we should have e-mailed them, or called them and just told them. But we want to be in charge of that conversation and that situation, and we wanted to give them time with just us (or me) to ask questions, talk about their fears, and try to make it feel normal. Yes, we are afraid of what his x might say to the kids. We've heard enough from the kids to know that she is not always honest with them about the divorce, about my husband's career, about the entire situation. Why wouldn't she try to twist this into something bad as well. Now, don't get me wrong. She doesn't talk bad about my husband and when he's home, we get the kids as much as we want. However, when it comes to the divorce, she obviously can't tell the truth (well kids, Anthony was just better in bed and he told me he had a lot more money than your dad, so I left) (Also, I am not indicating that I believe Anthony is better in bed. I have met Anthony and I actually have a hard time imagining Anthony having sex with a woman.). Therefore, the reasons she gives the kids for the divorce are just ludicrous: he choose the navy over the kids, he pays the navy to work there, so he doesn't have any money (which is why we pay an arm and leg in child support), he doesn't love the kids, that's why she left (and gee, that's why we get them as much as possible, because we don't want them). I'm just wondering how this is going to go over. Yes, the kids knew we wanted more kids, but that doesn't mean they understood we would have them, or how that would change their lives. So I'm a bit worried. But I'm going to try to make it as good and exciting as possible. Send good thoughts my way.