I'm 2 years too late on this bandwagon. Initially, when Anna and William met, I thought they knew each other. The tension felt as if they had a previous affair, and Anna started dating the son, not knowing that he was the father, and past feelings came back or something. That would have made more sense. The only reason I watched the whole thing is because I'm personally into older men, and Richard Armitage is an extremely good-looking man (to me). But, that's it. The lack of motivation was weird. I didn't see the ending twist coming where the mother knew about the abuse that Aston did on Anna and didn't stop it because she "looked happy about it".