T.B.
I am in a very similar situation. My kids are (nearly) 9, 3, and 10 months, and I want to get pregnant in August. I wanted 6 originally, but now I want just 4 (because of having to have 2 c-sections). Honestly though, if we could afford it we'd probably have a dozen. My husband feels as though we aren't in a position to have any more, but I REALLY want one more. I can't explain it, I know it isn't rational, but I don't care.
I grew up as the oldest of 5 children, in an extremely poor family. I would trade my siblings for all the money in the world. There is no one in the world that you can count on like a brother or sister and I want my kids to have that. My siblings would do ANYTHING for me, and that feels great.
I've been slowly bringing it up with my husband, asking him if he is ready to talk about it, about once a month. DON'T be pushy :) Finally, last week he said he was willing to talk about it, and we had a long talk about the options, consequences, etc. I think its going to happen but we still have some more talking to do.
I hope it helps to hear somone else who feels the same way. Good Luck!!