A question about (cat) pregnancies

I say (cat) because I'm not sure if it is the same with dogs, though I'm betting it is, just to simplify one little thing in the game. Anywho, my cat puked 5x in quick succession and I was worried, as I'd not put the outdoor 'privy' plant out for her to be fighting squirrels in so I was sure it wasn't squirrel scratch fever. The vet said she was fine and sent us off. That night she had kittens. There was zero indication of pregnancy (a pregnant cat gets HUGE, I know this from personal experience) but Squidge wasn't showing any weight gain. I would have expected the vet to tell me 'she's fine, BUT she's pregnant'. She was just examined, no?

Can we get an option for a pregnancy test at the vet or something? Those kittens were a total shock to me. I knew she'd been in heat but in previous saves I'd trotted my breed-ready girl all over Brindleton Bay hoping for a pregnancy and never got one. This time I took her nowhere, and bam! 2 kittens out of nowhere! There was only room for 2 since my parents miraculously had triplets for their first pregnancy. *eyeroll* New family, new funds, tiny house, so naturally I got triplets, go figure. Anyway, I'd love some way to tell if my fuzz-baby is pregs with her own babies. Is this a possibility?

Also, is there any way to find out who the father is? I'd dearly love to know! :D

~Tyger <3