Ignorant soon to be Moms

Me and my fiancee have been TTC for 5 months now . A month and a half ago his best friends who were barely dating for less than a month found out they were expecting (im devastated that they are expecting before us). Just last weekend all of us were hanging out while the guys were drinking or so i thought it was only the guys cause then i took notice that she was chugging away and smoking .Afterwards she said she didnt know that affected the baby in any way yet she continued drinking a little after . My fiancee told me that it wasnt her first time drinking ,she has been intoxicating her and her baby since she found out she was expecting, but she's excited to have a baby on the way.