Reference for Yevamot 108:16

נראה למי דומה דנין איסור הבא מאליו מאיסור הבא מאליו ואל תוכיח דודתו שאין איסור הבא מאליו

it is the same whether she is paternal or maternal. But might it not be argued<span class="x" onmousemove="('comment',' [H] = [H] 'cease and go', similar to apage, [G]. ');">³⁹</span> in this way: A man is subject to a penalty<span class="x" onmousemove="('comment',' For intercourse. ');">³⁷</span> in this case and is also subject to a penalty<span class="x" onmousemove="('comment',' For intercourse. ');">³⁷</span>

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