Weird response to pregnancy announcement?

Soooo my cousin commented on a something I shared on fb basically like "wait til you have your own kids, it'll be completely different" and what not and so I figured it would be a good opportunity to announce my pregnancy to her since I don't really plan on telling anyone. So I inboxed her and told her, she gave me the normal "congratulations!" At first and I told her thank you and how excited I was. However, things took an "interesting" turn. Her next response "I hope you have found a good man who will be there for you and your baby." 😐 (my face when I read that.) It was immediately extremely weird and slightly rude considering she knows zilch about my personal life. This is my first baby, it's not like I have 6 deadbeat babydaddies. I informed her that my boyfriend and I have been together two years and are living together. I just feel like perhaps it might have been an underhanded compliment since she is married and my whole family believes in marriage before kids and blah blah blah and I'm not married. I'm not necessarily mad at her, I was just a touch offended because it felt like a petty thing to say. What do you guys think?