Not divorced, but thought this might be a place to gain the right perspective.

Wife (36f) and I (39m) continue to go back and forth on having an additional kid (or two). Currently we have one 3yr old. One of the (larger) concerns I have is the strain one child has already put on our marriage. My wife is constantly tired, more irritable, and our connection (both emotional and physical) has also taken a toll. I understand these years are some of the toughest, and we're working through these things and are in a good place for the most part, but I fear doubling or tripling down with more kids will make these issues even worse. So my question(s) - Do you think this is a valid concern? Do you think your marriage could have been better/salvaged if you just had one child?