Complex sentence: Akademie Verlag, 2010,, p.230 Trajan himself seems to have been less than enthusiastic about marrying his grandniece to Hadrian; with good reason, as the couple's relationship would prove itself scandalously poor, even for a marriage of convenience.
Split into simpler sentences: Akademie Verlag, 2010,, p.230 Even so, Trajan himself seems to have been less than enthusiastic about marrying his grandniece to Hadrian; with good reason, as it turned out. The couple's relationship would prove itself scandalously poor, even for a marriage of convenience.