They may be able to get married but they will never enter the bounds of Holy Matrimony.
They are married to their sin.
Absolutely. It's impossible for them. The word matrimony refers to the institution that brings about and protects mothering.
So, by natural law woman to woman can never become mothers.
And, by revealed law they can never be Holy.
Our era is near the point when Christians should seek matrimony separately from the state, and there should be a consortium of historic Christian Churches which recognize one another's duly sealed matrimonial bonds.