Russian ladies are known to be feminine, but don’t think they are not strong.
Russian women acquired a right to work equally with men at plants and factories and other places during the Soviet times, and have practiced this right ever since. As far as Russia lost an enormous number of men during the wars and the Stalin dictatorship of the 20th century, women had to become really strong. Earning their living by hard work, they often were the only supporters in the families with no men. At the same time, the realization came that those men who managed to survive were to be fought for and cared for. Women became responsible for all domestic chores and children upbringing. Men would take their sacrifices for granted and reluctantly share these responsibilities or be of no help around the house and with children.
Nowadays, many Russian ladies grasp for chances to find responsible partners and husbands abroad. They are looking for men who would truly care for their wives and children. They had lost the hope of finding this type of guys in Russia.
So you are to be this kind of guy. When she leaves everything behind and breaks all the social and cultural ties she had in her home country, she believes it is worth it. Because you are the responsible husband and father she is looking for, the one she can trust and love.