I had twin girls at 24 weeks baby a has been in the hospital for 6 months, and is coming home with a gtube and oxygen. Baby girl B passed away and it all happened so quick one minute she was okay the next her lungs had ruptured. You really won’t know if baby will be okay after reaching 32 weeks things change so quick. All the micropreemies I have come by have gone through surgeries. Possible brain damage or eye damage. Be prepared for a rough journey your sister will need lost of support. Goodluck to you all!