a song of ice and fire - Does joining an order that requires celibacy automatically annul your marriage in Westeros?

I am wondering about the marriage laws of Westeros. To keep this question from being too broad, let’s discuss only the case of the prevalent religion of Westeros, the Faith of the Seven.

We do know that a marriage of people adhering to Faith of Seven can only be annulled by the High Septon or a council of faith if it hasn't been consummated.

The following orders require vows of celibacy in Westeros:

1. Kingsguards


2. Nights Watch


3. Order of Maesters


4. Septons and Septas of faith


5. The Silent Sisters

We do know Ser Quentyn Ball sent his wife to join the Silent Sisters so that he could be free to take the vows of the Kingsguards, since he couldn't get his marriage annulled as it had been consummated. That implies that simply swearing the Kingsguards vows won't automatically annul his marriage.

So what happens if a married man is made to join the Nights Watch? Does his marriage get annulled automatically or is his wife bound to be alone for the rest of her life?

Also what happens if a married man takes the vows of Citadel to become a Maester or becomes a Septon?

For women adhering to the Faith of the Seven, the situation seems clear that joining the Silent Sisters will annul their marriage. It is not so clear as to what happens when a married woman wishes to be a septa? Virginity might not be required to take a Septa's vow because we know Septa Lemore has childbirth marks. (But that in itself means nothing, she might have gotten pregnant after taking a Septa's vows. That is of course if she is not what she is suspected to be).

I have also created a Reddit thread for it here, but there are not really many insights there. But do check it in case there might be some comment which might help you form your answer.

Answer

I will try to answer the question in general but just note that different orders probably have different rules on marriages. Also it likely depends on who you are: high-born/low-born, male/female, noble/peasant etc.

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We do not know and there appears to be people on three sides of the argument with:

1. No you're both still married


2. No but it does mean that an annulment is possible


3. Yes you are annulled

The biggest group of people seem to believe that option 3 is the most likely; especially when considering the Night's Watch. This is because joining the Watch essentially means that you are dead to the world. You give up any titles or lands and leave your place in the world, it would make sense that you also give up your wife. However, as others have pointed out before, the oath is expressed in terms of not doing anything in the future so it does leave way for the Watchmen to still have a wife.

Night gathers, and now my watch begins. It shall not end until my death. I shall take no wife, hold no lands, father no children. I shall wear no crowns and win no glory. I shall live and die at my post. I am the sword in the darkness. I am the watcher on the walls. I am the fire that burns against the cold, the light that brings the dawn, the horn that wakes the sleepers, the shield that guards the realms of men. I pledge my life and honor to the Night's Watch, for this night and all the nights to come.

I've had a brief conversation with Elio, one of the co-author's of The World of Ice and Fire, on twitter and he seems to be in camp 2 for someone joining the Night's Watch.

I think someone could take the black without necessarily annulling the marriage, but their having taken the vows would give grounds for the wife to get an annulment. Just my guess.
_{Twitter, @westerosorg}

In this conversation he's also stated that Fireball sent his wife to the Silent Sisters to annul their marriage so he could become eligible to be a member of the Kingsguard. This theory means a man must not be married before joining the order but the implication is the same as you state in that joining the Kingsguard likely doesn't annul a marriage. It would even seem, from Elio's answer, that it is impossible to join if you are married.

Marriages must be annulled before one can become a member. Fireball forced his wife to become a silent sister, apparently, which allowed him to get the annulment that would make him able to take the vows of the Kingsguard.
_{Twitter, @westerosorg}

From Elio's above tweet it would also seem that a wife joining the Silent Sisters means their marriage became eligible for an annulment not that it was an automatic process.