What is wrong with my sister ? !?

[Daphne]

My sister wrote on her Facebook page that being a teenage mother is a great thing. I don't think it is. Just because she had a kid at 14 now that she's 18 having another one doesn't mean it's a nice thing. She even said women who have kids at 30 or 40 suck and are stupid. Her and my other sisters are young too and they're having kids and getting married. The youngest one just had twins and she's 16. And my sisters who are 21 and 22 are also having kids. I'm 19 my boyfriend is 23 and I'm not even ready for kids and she called me stupid. Me and my boyfriend are getting married soon but were not ready for kids. I'm not even in collage yet I don't even have a job. I think she's lost her mind and all my other sisters have too. My ex girlfriends cousin just had her baby and she's 17. Half the girls from my school have kids and are getting married and they're younger than me and even my favorite singers cousins are my age and they're married and have kids. I feel like everyone is having kids except me. I'm not jealous or anything I just feel alone. Why are so many teen girls having babies ? And what is wrong with my sister ? ! Should me and my boyfriend have a baby or wait a few years ?