Can my husband (US Citizen) submit a petition for me and my parents and my sister at the same time?

In general, a U.S. citizen may sponsor a spouse for immigration benefits and simultaneously sponsor other family members. There is no visa category, however, by which a U.S. citizen may sponsor the father, mother or sister of a spouse. Once the foreign national spouse becomes a Permanent Resident, and then later succeeds with an application to become a naturalized citizen, she will be able to sponsor her parents and siblings, but note that there is a very long backlog for visas in the category by which a U.S. citizen may sponsor a brother or sister, and so that rarely is a satisfactory immigration-related strategy. Of course, there are many other details that determine immigration eligibility. It would be wise for you and your husband to consult with an immigration attorney who, after learning all of the relevant information, could advise about eligibilities, options and strategies to attain your goals, and who then could offer legal representation in the often complex application process.