ו אֵין עֵדִים שֶׁזִּנְּתָה, אֶלָּא שֶׁהִיא אוֹמֶרֶת שֶׁזִּנְּתָה, אֵין חוֹשְׁשִׁין לְדָבָר זֶה לְאָסְרָהּ, דְּשֶׁמָּא עֵינֶיהָ נָתְנָה בְּאַחֵר, וְדַוְקָא שֶׁאֵין רַגְלַיִם לַדָּבָר, אֲבָל אִם יֵשׁ רַגְלַיִם לַדָּבָר נֶאֱמֶנֶת (פִּסְקֵי מהרא"י סִימָן רכ"ב), אֲבָל אִבְּדָה כְּתֻבָּתָהּ, עִקַּר וְתוֹסֶפֶת וּמַה שֶּׁאֵינוֹ בְּעֵין מִמַּה שֶּׁהִכְנִיסָה לוֹ. וְאִם חָזְרָה בָּהּ וְנָתְנָה אֲמַתְלָא לִדְבָרֶיהָ לָמָּה אָמְרָה בִּתְחִלָּה כֵּן, נֶאֱמֶנֶת (הַגָּהוֹת מָרְדְּכַי דְּקִדּוּשִׁין). וְאִם הָיָה מַאֲמִינָהּ וְדַעְתּוֹ סוֹמֶכֶת עַל דְּבָרֶיהָ, הֲרֵי זֶה חַיָּב לְהוֹצִיאָהּ, אֲבָל אֵין כּוֹפִין אוֹתוֹ לְהוֹצִיאָהּ. אֲבָל אִם נֶאֶנְסָה, לֹא הִפְסִידָה כְּתֻבָּתָהּ, לֹא אֵשֶׁת יִשְׂרָאֵל וְלֹא אֵשֶׁת כֹּהֵן. הַגָּה: וְעַיֵּן לְקַמָּן סִימָן קע"ח סָעִיף ט'. אָמַר אֶחָד עַל אִשָּׁה אַחַת שֶׁזִּנְּתָה עִמּוֹ, נֶאֱמָן עָלֶיהָ כְּעֵד אֶחָד, דְּפָלְגִינָן דִּבּוּרֵהּ (רַשְׁבָּ"א סִימָן תקנ"ב). וְאִם הִיא הוֹדֵית לִפְנֵי אֶחָד שֶׁנִּטְמֵאת, הַנֶּחְשָׁד מִצְטָרֵף עִם אֶחָד לְאָסְרָהּ עַל בַּעֲלָהּ (פִּסְקֵי מהרא"י סִימָן רכ"ב). הוֹדֵית לִפְנֵי אֶחָד שֶׁזִּנְּתָה, וְאַחַר כָּךְ אוֹמֶרֶת שֶׁשֶּׁקֶר הוּא, וּמַכְחֶשֶׁת הָעֵד הַמֵּעִיד עָלֶיהָ, מֻתֶּרֶת לְבַעֲלָהּ אַף אִם מַאֲמִין הַבַּעַל לָעֵד הַמֵּעִיד עָלֶיהָ, דְּאָמְרִינָן בִּתְחִלָּה שֶׁהוֹדֵית נָתְנָה עֵינֶיהָ בְּאַחֵר וְעַכְשָׁו חוֹזֶרֶת בָּהּ (בַּמַּהֲרִי"ק שֹׁרֶשׁ פ"ב). אִשָּׁה שֶׁאָמְרָה לְבַעֲלָהּ שֶׁזִּנְּתָה, אַף עַל פִּי שֶׁאֵינָהּ נֶאֱמֶנֶת, אִם עָמַד וְגֵרְשָׁהּ, אָסוּר לְהַחֲזִירָהּ; וַאֲפִלּוּ אִם הֶחֱזִירָהּ, יֵשׁ לָחוּשׁ (מַהֲרַ"ם פַּדָּוואָה סִימָן ל"ד):
6 If there are no witnesses that she committed adultery, but rather she herself says she has committed adultery, we are not concerned about this matter to forbid her [from her husband], as perhaps she [merely] set her eyes upon another. This is only if there is no reason to believe her, but if there is reason to believe her, she is trusted (Decisions of Mahara"i #222). But she does lose her marriage contract--both the essence and the additions--and property which she brought into the marriage and is not longer extant. If she goes back on her words and gives a reason that she would have lied in the first place, she is trusted (Glosses of Mordekhai to Kidushin). If he had believed her and his thoughts are now reliant on her words, he is obligated to send her out, but we do not force him to send her out. But if she were raped, she does not lose her marriage contract, whether she is the wife of an Israelite or the wife of a priest. Rema: See above, 178:9. If one said about a woman that she committed adultery with him, he is believed about her as a single witness, for we split his testimony [and do not believe hims testimony about his own adultery] (Rashb"a #552). If she admitted before an individual that she became impure, the suspect joins this individual to forbid her from her husband (Decisions of Mahara"i #222). If she admitted before an individual that she committed adultery, and afterward says that it was a lie, and contradicts the witness who is testifying about her, she is permitted to her husband even if her husband believes the witness who is testifying about her, for we say that when she first admitted, she had [merely] set her eyes upon someone, and now she is going back on that (Mahari"k #82). A woman who says to her husband that she committed adultery, even though she is not believed, if he divorces her, he may not bring her back, and even if he did bring her back, there is reason to worry (Mahara"m Padua #34).