I am and American citizen whose husband is from Denmark and is currently a permanent resident of Spain. My son (who is dual citizen of USA and Denmark) and I will be flying to Spain to join my husband in 3 weeks, and plan on staying for longer than 3 months. I plan on becoming a resident as soon as I arrive back in Spain...I have all of the paperwork necessary to do so. My issue is that I will be arriving in Spain without a return ticket to the US. Will this be an issue since I don't currently have my Spanish residency? Do I still need a return ticket?