ב נִתְיַחֵד עִמָּהּ בִּפְנֵי שְׁנֵי עֵדִים, וְהָיוּ שְׁנֵי עֵדִים כְּאֶחָד, וְרָאוּ הוּא וְהִיא אֶת הָעֵדִים, אִם הָיְתָה מְגֹרֶשֶׁת מִן הַנִּשּׂוּאִין, חוֹשְׁשִׁין לָהּ שֶׁמָּא נִבְעֲלָה, וְהֵן הֵן עֵדֵי יִחוּד הֵן הֵן עֵדֵי בִּיאָה. לְפִיכָךְ, הִיא סָפֵק מְקֻדֶּשֶׁת, וּצְרִיכָה גֵּט מִסָפֵק. וְאִם הָיְתָה מְגֹרֶשֶׁת מִן הָאֵרוּסִין, אֵין חוֹשְׁשִׁין לָהּ, שֶׁהֲרֵי אֵין לִבּוֹ גַּס בָּהּ. וְאִי חָזֵינָן לְהוּ דְּגַיְסֵי אַהֲדָדֵי, חוֹשְׁשִׁין לָהּ. הַגָּה: אֲבָל אִם נִתְיַחֵד עִם מְשֻׁדֶּכֶת שֶׁלּוֹ, אַף עַל גַּב דְּגָס בָּהּ, לֹא חַיְשִׁינָן, אֶלָּא אִם כֵּן בָּא עָלֶיהָ בִּפְנֵי עֵדִים (תְּשׁוּבַת הָרַמְבַּן סִימָן קל"ה):
2 If he was alone with her before two witnesses, and the two witnesses [testified] as one, and he and she saw the witnesses, if she were divorced from marriage, we are concerned that they had sex, and the witnesses of their being alone are witnesses that they had sex. Therefore, there is doubt as to whether this constitutes a marriage, and she requires a bill of divorce out of uncertainty. If she had been divorced from betrothal, we are not concerned about her, for he does not desire her. If we see that they do desire each other, we are concerned about her. Rema: If he was alone with his match, even though he desires her, we are not concerned, unless he had sex with her before witnesses (Responsa of the Ramba"n #135).