My fiancé’s brother was married last year. His brother’s new wife got pregnant shortly after. My fiancé and I got engaged in February when she was 8 months pregnant, with a girl. We announced to our families that we were engaged. When asked details, we said we were thinking some time next summer, outside in the garden. My future sister-in-law texted me and said (while still pregnant) “Congrats! I know my daughter will look beautiful when she goes down the isle as your flower girl!” I was taken aback at how she just assumed her future daughter would be our flower girl. I handled it by texting her back “Thanks! We are very excited about our wedding!” My fiancé was really upset that she would say that to me and that she would put me in such an uncomfortable and unnecessary position. The baby was born and a few months later at a family reunion of my fiancé’s family, she again brought it up by asking what we would like her daughter to wear in the wedding. Her entire world is her baby. Her baby is all she talks about when I converse with her and it’s difficult to get a word in edgewise about anything else. How do I nicely tell her we won’t be having a flower girl (or any child attendants)?