Sotah 1:2-3

Sotah 1:2

Here is how a man warns his wife about seclusion: If he says to her in front of two witnesses not to converse with a certain man and she is observed talking to him, she remains permitted to her husband and, if married to a kohein, she may continue to eat terumah. If she entered a private place with this man and remained there long enough to engage in intimate relations, she is prohibited to her husband and may not eat terumah. If her husband died, she may only perform chalitzah with one of his brothers, not yibum.

Sotah 1:3

The following, if married to kohanim, may no longer eat terumah: one who tells her husband that she is prohibited to him, and one about whom witnesses testify that she is prohibited; one who refuses to undergo the sotah process; one whose husband doesn’t want to make her undergo the process; one whose husband had marital relations with her on the way to court for the sotah ceremony. How should a man proceed? He takes her to the local court and they appoint two scholars to chaperone them on the trip to Jerusalem to keep them from engaging in marital relations. Rabbi Yehuda says that chaperones are not necessary because a man is trusted in this matter.