To properly congratulate your friend on her new arrivals, you'll need to translate her statement first. The phrase "Ang pusa ko ay kakapanganak lang nang limang kuting" is in Filipino, which translates to "My cat is about to give birth to five kittens" in English. Therefore, she has five new babies. Congratulate her on her bundle of joy by saying: "Congratulations, [Friend's Name]! Your cat just had five beautiful, adorable kittens. They're all so precious and I can't wait to meet them soon. Wishing the mother and her kittens a speedy recovery and all the best."