Kylie Jenner might have to adjust to being a mother of two, but according to sources close to the growing family, she’s already getting some help from an important person.The makeup mogul and her boyfriend, rapper Travis Scott, welcomed their second child together on February 2. The baby boy, Wolf Webster, has only been home for less than two weeks, but it looks like he’s already bonding with his big sister, 4-year-old Stormi.Stormi has been “helping out with [her] baby brother,” a source tells PEOPLE.