Sex and marriage? Marriage and sex?

So, I've been married for a little over a week now. So far we're doing great, especially sexually. We dated for two and a half years before marriage so we knew we were very compatible sexually but it wasn't until after we were married that I started to open up to him about my fantasies and it's made intimacy all the better. Now that he's back to work again I'm sure we won't be as sexual as we have been (he works with his hands and is very tired at the end of the work day) but I'm hoping that when we find time he'll still be as dominant and as aggressive as during our honeymoon. That being said, he wants to start having children as soon as it's possible (which may be quite some time as I was on a pretty hostile birth control method prior to getting married) but I'm wondering how having children is going to effect our sex life... will my husband still be as 'freaky' as he has been lately? I don't want to go back on birth control but I do want to enjoy this time as honeymooners for as long as it's possible..