She did procreate. She had 3 children. It is not helpful at this stage to speculate on whether she had a long term plan. The OP considers himself married and three children need a mother and father. Retroactive speculation does not help.
It is more likely his wife is tired and feels incapable of having more children.
60 years ago nobody would have obtained an annulment if their wife got herself sterilised at 40 after 3 children. Now they are handed out like confetti and idiots like you whisper into the ears of men who should be trying to save their marriages, not run away like cowards.
You can't even listen to yourself. Someday you might come by this board years from now and read what you're saying and see how utterly ridiculous you sound. SHE PROCREATED ON HER OWN TERMS. Now she's choosing to leave God out of the equation completely.
And yes, she "feels" incapable, but with some prayers from her husband, she can regain that confidence. To just say "DERP OH WELL, SHE IS JUST GOING TO POTENTIALLY KILL OUR NEXT ONE! FIRE AWAY!" No, that is not the Catholic way to handle this situation.