Hailey Bieber. Marc Piasecki/WireImage Hailey Bieber got real about how she’s maintaining her work-life balance after becoming a mom for the first time, “I’m only doing what feels comfortable for me physically, mentally and emotionally,” Bieber, 27, said in an interview with Women’s Wear Daily published on Wednesday, October 16. Hailey and husband Justin Bieber,…