It seems there might be a bit of confusion in the translation or understanding of the phrase you provided. The phrase "Ang pusa ko ay kakapanganak lang nang limang kuting" is in Filipino, which translates to "My cat just gave birth to five kittens" in English. So, based on this information, your friend's cat has given birth to five kittens. If you want to congratulate your friend on the new additions to her family, you could say something like: "Congratulations on the new arrivals! Five kittens must be such a joy and a handful at the same time. Wishing you and the little ones all the best!" This message acknowledges the new babies and expresses well-wishes for both your friend and the kittens.