My husband and I had been together since we were kids (I was 14 he was 15) before we married in our early 20s. So when our first born came along we were very comfortable with each other and so had lots of love and time to give to little H!
Because of circumstances (no jobs in our area) my husband joined the forces soon after we married, so we kind of had to get used to being without each other for long periods. Then we had the added stress of moving away from our hometown (to a different country in fact!) so I didn't even have any family close at hand.
We'd been married 4 years before we decided to try for a baby. Little H was worth it and certainly I think our waiting to take the plunge helped us cope better with the demands of a new baby.
Little H affected our marriage in a beautiful way.