Halakhah for Yevamot 116:3
אי הכי היינו ארוסה ולטעמיך נשואה וכנוסה לאו חדא מילתא היא אלא נשואה דידיה וכנוסה דחבריה הכא נמי ארוסה דידיה ושומרת יבם דחבריה
addressed to her a ma'amar,<span class="x" onmousemove="('comment',' And then cohabited with her adulterously in her father-in-law's house, with no intention of effecting a legal kinyan. Alternatively: Only a ma'amar was addressed to her but no cohabitation at all took place. The cohabitation of the adulterer which, according to this interpretation, precedes that of the levir does not affect the legality of the water test since in any case the cohabitation of the first husband (the deceased brother) preceded. ');"><sup>7</sup></span> and it<span class="x" onmousemove="('comment',' The Mishnah cited by R. Shesheth. ');"><sup>3</sup></span> represents the view of Beth Shammai who maintain that a ma'amar constitutes a perfect <i>kinyan</i>.<span class="x" onmousemove="('comment',' Supra 29b. The sister-in-law thus loses entirely her former status of 'widow of a deceased brother' and assumes that of a 'betrothed woman'. Subsequent intercourse with her unless accompanied by the entry into the bridal chamber does not, therefore, change her status, as is the case where no ma'amar had been addressed, to that of a married woman. Her description, consequently, can only be that of 'one awaiting the decision of the levir'. ');"><sup>8</sup></span>