Welcome to the Q&A Forum

Aloha, I am completely new at this, so please forgive me if I am not describing my question very well, or if these questions has been asked many times before! My husband and I have an LLC and a DBA which sell the same products (although with different emphasis). For the LLC and DBA we have different domains, but we would like for both domains to lead to the website.  To do this I have set one domain as primary  (makanagardens.com) and the other as parked (bigislandcoffeeroasters.com). My questions are these: Since both domains have the same content, could I be "demoted" by google for duplicate content? I have submitted sitemaps for both domains to google and bing. Is that alright? Does it matter which domain name we link-build upon? So far I have been link-building upon whichever domain is applicable at the time. Thanks!