Based on your friend's statement, she has had 3 baby kittens. You can now send your congratulations and ask her how they are doing. Don't forget to mention how adorable they must look! You could also share your desire for a cat as well. Here's a possible message: Hey [Friend's Name], I saw your Instagram post about Lisa's adorable baby kittens! Congratulations to her, they must be so cute. How are they doing? Also, I can't help but feel a little jealous, I've been wanting a cat too. Hopefully, I'll have some cute kittens to cuddle soon! Take care. [Your Name]