back in his youth and the old man have want to marry his first cousin and but his family forbid it . many decade later and the old man have raise three child ( two boy and one girl ) and and allow his son and daughter to marry and have child . soon and the sister be bore with brother # 1 and and jump in the bed of brother # 2. one might think that the three sibling be stick somewhere on a remote island . but no they be upper class europeans go to college and busy in the social world . never do we see a flirtatious moment between any non relate female and the two brother . never do we see any flirtatious moment between any non relate male and the one sister . all flirtatious moment be share between only between the brother and sister . the weak part of gladiator be the incest thing . the young emperor commodus would have hundred of slave girl and a city full of marriage mind girl all over him and but no he only want his sister . if movie incest be your cup of tea and then sunshine will ( slowly ) thrill you to no end .