Breastfeeding my best friends baby

Sydnie • Due March 8th❤️

So I need some help moms, my best friend had her daughter on December 3rd and her milk has dried up. I am due March 8th and she is wanting me to breast feed her baby. The only way I wouldn’t is if I didn’t produce enough for both! Her daughter also has a problem with formulas which they are trying to deal with right now. If any mothers have breastfed another persons baby or donated milk or relates to this AT ALL help me I have a few questions!!