Unfortunately I do not have enough context to determine exactly how many babies Lisa's cat had. The key sentence is: "Ihre Tatze hat 3 Junge bekommen - die kleinen sehen sooo süß aus." This translates to: "Her paw had 3 young - the little ones look soooo cute." Without more context, I will assume that "Tatze" (paw) is referring to Lisa's cat. The sentence then states that Lisa's cat had 3 young (kittens). So based on the limited information provided, it seems Lisa's cat had 3 kittens. I would congratulate your friend and say something like: "Wow, wie aufregend, dass Lisas Katze 3 Babys bekommen hat! Bitte richte ihr meine Glückwünsche aus." "Wow, how exciting that Lisa's cat had 3 babies! Please pass along my congratulations to her." Let me know if you need any clarification or have additional details to share. Congratulations to Lisa on the new kittens!