Siman 346
Presented here for study, not as a practical ruling. The Shulchan Aruch rules by Sephardi custom, the Rema's glosses by Ashkenazi custom, and the Kitzur follows Ashkenazi custom. For a practical question, ask your rabbi.
א מִי שֶׁהָיָה בַּעֲלָהּ עִמָּהּ צָלוּב בָּעִיר, אוֹ שֶׁאִשְׁתּוֹ עִמּוֹ צְלוּבָה בָּעִיר, אוֹ אָבִיו וְאִמּוֹ, וַעֲדַיִן לֹא כָּלָה הַבָּשָׂר כֻּלּוֹ, לֹא יִשְׁהֶה בְּתוֹכָהּ אֶלָּא אִם כֵּן הָיְתָה גְּדוֹלָה כְּאַנְטוֹכְיָא, שֶׁאֵין אֵלּוּ מַכִּירִין אֶת אֵלּוּ, וְלֹא יִשְׁהֶה בְּצַד זֶה אֶלָּא בְּצַד זֶה.
1 One whose husband [who was] with her, was impaled in the [same] city [wherein she dwells], or his wife [who was] with him, was impaled in the [same] city [wherein he dwells], or [if such is the case with] one's father or mother, and the flesh [of the corpse] had not yet entirely wasted away, — [the law is that the near-of-kin] should not dwell therein, unless it was as large as Antioch, where some [people] do not know others; and one should not dwell on this side, but [rather] on the other side.