cat pooping outside of litter box, always in same spot!

[Taz_Zoee]

I don't have a solution to the problem, but perhaps the "change" like Karen is asking about IS the fact that you are expecting.

Cats and dogs can sense this stuff. Maybe you are getting the nursery ready for the arrival of the new one.

Have you taken him to the vet for a check up since this has started?

[lizbud]

Do you use more than one box? Some cats will not pee & poo in the same box. Put another box where he has been doing his business. I know
sometimes space could be a reason to use one box, but then just put the 2nd box next to the first. Hope this works for you.