All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu 'alyhi wa sallam, is His slave and Messenger.
Your husband is obliged to be just between you and his second wife in staying overnight with each one of you. The fact that the two wives are in different countries is not a religious impediment for the obligation of being just in staying overnight with them. Ibn Qudaamah said,
If a husband has two wives in two different countries, he has to be just between them as he has chosen to be distant from one of them. Being far does not exempt him from fulfilling her rights. He is obliged either to travel to the distant wife when it is her turn or to bring her to his own country where he is staying with the other wife. If she refuses to come though she is able, then she loses her right due to her disobedience. However, if he wants to be just between them while each one of them is in her own country, and it is difficult for him to stay overnight equally with each of them, then he may set an amount of time for each of them according to his ability. For instance he may stay one month with one wife and another month with the second, or set a time of more or less than that according to his ability and according to the distance between the two countries.
No doubt, the statement of Ibn Qudaamah has to be specified by understanding that dividing the time between the two wives should not lead to the harm of any of them, that is, by the husband staying a long time away from her. The Prophet , said: “There should be no harm nor reciprocal harm.” [Maalik]
In addition to this, the fact that the second marriage was conducted with his consent and the consent of his second wife does not exempt him from being just between them. It is Allaah who gave the permission to the husband to marry a second wife and it is He who ordered him to be just between them.
In any case, we advise your husband to hasten to bring both of you in one country so that he can be just in staying overnight with each one of you without difficulty.
Finally, it should be noted that a wife is obliged to reside where her husband resides. If she refuses to reside with him without a sound excuse that prevents her from doing so, then she is disobedient, and therefore she loses her right (of her husband’s staying overnight with her) because of her disobedience as stated above by Ibn Qudaamah . For more details, please refer to Fatwa 90663.
Allaah Knows best.