To much change.

My SO really wants another dog so that our dog has company. I feel like this would be way to much for us and the dog. Im due in 3 months with our first. And if we got a new dog I feel like my dog would get really upset at the lack of attention between a new dog and a baby. Hes a huge baby himself. My SO is barely ever home he works full time a town away so im going be at home with baby and dog by myself 99% of the time. I just feel annoyed because he keeps showing me pictures of dogs and I keep saying NO!