If you have children with him, you will NOT be able to take them with you to another country without his consent. If you split up, you will either have to remain in the US permanently in order to have joint custody or you will have to leave your children behind with him (unless he miraculously agreed to give you sole custody and signed away all his rights). you should also not be even thinking about having children with someone unless you know them EXREMELY well and have worked out every "what if" detail you can imagine. The vast majority of my friends who have children are divorced and have been through horrific custody battles. Couples who are from the same town, were married 15 years, and live 5 miles apart cannot even seem to agree on anything when it comes to their kids! Imagine when you are from different countries and barely know each other! If you want to have an adventure by yourself, that is your choice. But please be responsible about bringing children into the world. Not to mention, with him approaching retirement and you not working, how could you possibly raise children from 0-18 years?