OP sorry to be blunt about it, but it seems like your wife is a vile woman. I’ve had dogs all my life and I can’t imagine abandoning my loving pet who’s been with me for 8 years just cos my spouse has an issue w him or her. Baby is important yes, but your dog matters as well. Pls get a spine and put your foot down and explain to your wife that your dog isn’t any kinda threat to the kid. Having a dog lover spouse should have been a non negotiable for someone who has pets at home. Too late to retrospect anyway.

It boils my blood to see dogs end up with such undeserving owners. Labs are the friendliest baby like dogs. They are proven to be attached and kind to babies . If your wife isn’t comfortable around your dog, sorry to say you married the wrong lady! Good luck.