If your wife says she wants a baby, repeatedly, insistently, illogically, passionately… for months… she’s in the throes of the baby crazies.
Option 1 – Get her pregnant.
Option 2 – Roll the dice and don’t get her pregnant… Maybe she’ll just come around and snap out of it and be happy. Maybe she’ll mope about it but that’s it. Maybe she’ll tear the relationship apart so she can find a new husband that will get her pregnant. Maybe she’ll get “accidentally” pregnant to you. Maybe she’ll get pregnant to someone else and then come running back to you. Maybe you’ll never know that the new baby isn’t really yours.
In general though, nature finds a way. Be advised that women that really want to be pregnant have essentially no limits on what they will do to meet that goal.
I’m not saying it’s right that women act this way, I’m just saying that this is reality and this is exactly what women are biologically designed to do. Sometimes a third kid is cheaper and less effort than child support x2, alimony, losing half your stuff and having to start over.