Reference for Yevamot 110:7
הניחא למאן דאמר משמש מת בעריות פטור אלא למ"ד חייב מאי איכא למימר אלא פרט למשמש מתה דסד"א [הואיל] לאחר מיתה נמי איקרי שארו אימא ליחייב עלה באשת איש קמ"ל
That in connection with the designated bondmaid [is required] as has just been explained.<span class="x" onmousemove="('comment',' Supra 55a. ');"><sup>17</sup></span> <font>That in connection with a married woman excludes intercourse with a relaxed membrum</font>.<span class="x" onmousemove="('comment',' Since no fertilisation can possibly result. ');"><sup>18</sup></span> This is a satisfactory interpretation in accordance with the view of him who maintains that <font>if one cohabited with forbidden relatives with relaxed membrum he is exonerated</font>;<span class="x" onmousemove="('comment',' Shebu. 18a, Sanh. 55a. ');"><sup>19</sup></span>