Cats are difficult to figure sometimes
Just last week, I found out that "someone" was peeing in a basket on the floor that contained computer cords left over from other times. The basket had been there for a couple of years and never a problem. I don't know which kitty suddenly thought it was ok to pee in it, but I quickly cleaned the basket and cords. I left the cords in the bathtub where they were residing until I could figure out if I should toss them out etc. etc. Well, it seems that the cat thought another round of pee would improve the cords. After finding that, I tossed the cords. The basket is cleaned and hanging on a hook in my closet. THEN, this AM, I heard a cat in the bathroom "covering up" something. It was Juni, covering the pee on a bathroom rug. ..... I think she is not wanting to go outside to use the litter box, as I have them on the porch and they must go out to the very chilly air to pee. So, I moved a couple of boxed inside. One in the bathtub and the other in the dinning room area. Both have been used. Now I must wait and watch to make sure it is the cold causing the problem, and not an infection.
Cats can do the same thing for years and then suddenly, wammo, they change their mind!
I would have your male cat neutered for sure. It isn't that expensive, they recover almost over night and I think you and your new baby will be much happier....