[IDEM libro singulari de enucleatis casibus. ] §23.1.15.prTutor factam pupillam suam nec ipse uxorem ducere nec filio suo in matrimonio adiungere potest.
[BY THE SAME, in his single book On Solved Cases.] A tutor cannot himself take his female ward as a wife, nor join her to his son in marriage.
scias tamen, quod de nuptiis tractamus, et ad sponsalia pertinere.
You should know, however, that what we are discussing regarding marriage also applies to betrothals.