[ULPIANUS libro uicesimo sexto ad Sabinum. ] §23.2.12.prSi qua mihi uxor fuit, deinde a me repudiata nupsit Seio, quem ego postea adrogaui, non sunt nuptiae incestae.
[ULPIAN in the twenty-sixth book on Sabinus.] If a woman who was my wife was subsequently divorced by me and married Seius, whom I afterwards arrogated, their marriage is not incestuous.
§23.2.12.1Inter me et sponsam patris mei nuptiae contrahi non possunt: quamquam nouerca mea non proprie dicatur.
A marriage cannot be contracted between myself and my father’s betrothed, although she is not properly called my stepmother.
§23.2.12.2Sed et per contrarium sponsa mea patri meo nubere non poterit, quamuis nurus non proprie dicatur.
Conversely, my betrothed will not be able to marry my father, although she is not properly called a daughter-in-law.
§23.2.12.3Si uxor mea post diuortium alii nupserit et filiam susceperit, putat Iulianus hanc quidem priuignam non esse, uerum nuptiis eius abstinendum.
If my wife, after a divorce, marries another man and has a daughter, Julian thinks that this daughter is indeed not my stepdaughter, but nevertheless, one must abstain from marriage with her.
§23.2.12.4Adoptiuae sororis filiam possum uxorem ducere: cognata enim mea non est filia eius, quia auunculus nemo fit per adoptionem et eae demum cognationes contrahuntur in adoptionibus, quae legitimae essent, id est quae adgnatorum ius haberent.
I can marry the daughter of my adoptive sister: for her daughter is not my cognate, because no one becomes an uncle by adoption, and only those relationships are contracted in adoptions which would be legal, that is, which would have the right of agnates.
pari ratione et sororem patris mei adoptiui possum ducere, si non fuit eodem patre nata.
By parity of reasoning, I can also marry the sister of my adoptive father, if she was not born of the same father.