The Mishnah deals with the case we mentioned earlier: the wife takes a vow, and the husband upholds it rather than annulling it for her. In such a case the halachah rules that if she wishes to be divorced, he must give her a get and pay her kesubah.
The vows the Mishnah discusses:
"Shelo teilech l'veis ha'avel" - that she will not go to a house of mourning to comfort mourners.
"Shelo teilech l'veis hamishteh" - that she will not take part in the celebration of a wedding.
In both of these cases, if she wishes, he must divorce her immediately and pay her kesubah, because he is locking the door in her face. What this means is: if she does not go to houses of mourning and to shivah houses, and she does not attend weddings, then when a joyous occasion comes her way, or, heaven forbid, a mourning, and even at the time of her passing, people will not come to eulogize her and will not join with her, neither in her mourning nor in her joy.
The claim of "davar acher":
If, however, the husband claims that he upheld the vow because of another matter, he is entitled to do so and is not obligated to divorce her. "Davar acher" is a euphemism: it means that there are people and characters found in that place who are unworthy and immodest, and it is not a fitting place for her.
Conditions that may not be attached to the annulment of a vow:
"Al menas shetomri lifloni mah she'amart li" - the husband agrees to annul the vow, but makes it conditional upon her repeating to a certain person things that she said to him or that he said to her; things that are not fit to be repeated, since they belong to what is between husband and wife alone.
"Shetehei memalah u'me'arah la'ashpah" - that she fill vessels with water and pour them out onto the rubbish heap, an act that makes her appear as though she is behaving insanely. Some explain that it does not refer to an act of insanity, but rather that after they are intimate he asks her to cleanse herself in this manner in order to prevent pregnancy.
In summary: in each of these scenarios, if she wishes, he must divorce her and pay her kesubah. We have learned that a vow which locks her out of participating in the community, in the house of mourning and at a wedding feast, obligates him in a get and a kesubah, unless the husband raises the claim of "davar acher" that justifies it; and also that he may not make the annulment of the vow conditional upon degrading conditions, whether revealing matters that are private between husband and wife or performing an act that shames her.