We answered an ad on craigslist... A lady said she " took in" a cat and it got pregnant, but she didn't want to deal with kittens...she was giving away this pregnant cat. We adopted it Saturday. It turns out that this mamma cat was actually their cat for four years, and had three prior litters! Two or three of her grown offspring also lived in the same home. I am having a hard time understanding how someone could give away their pregnant family pet of four years, and it occurred to me that it's very possible that she is pregnant by her own offspring?! We Already love her and will keep her (and spay her!) but I am wondering what we might see as far as health issues with the kittens? We were planning on keeping one and have found good homes for the others already. Thanks for your help and advice!