Legal Question in Constitutional Law in Virginia

Yes, if this grandmother has formal legal custody of

these two girls, then she has so-called standing, i.e., legal eligibility to have a motion filed in her behalf to amend the custody order to have one of these two girls transferred to the custody of your husband. (However, that in no way means that the court will necessarily agree to it and grant the motion as it first and foremost must determine whether such a transfer would be in the best interests of the child at issue.)