Oh, so cat update for ya'll.
My wife took her to the vet today and they X-Ray'd her and verified no more kittens. The vet said most likely the reason they didn't make it was they were early. Vet estimated her age at around 5.
So, My wife finally admitted that she really did not want a 3rd cat. I agree. I do not want a 3rd cat. She just felt guitly because if she goes to a shelter she is older and likely won't get adopted.
Well, turns out, my mom's cousin is into some no kill cat fostering charity. We're relinquishing the cat to her, and she'll foster it until they find her a home. Which I'm sure she will, she's an absolute sweet heart.