Million Dollar Question

Don gives Sarah a small cake and a red dress for her to put on and then asks her what she wants.Sarah asks to get out of the basement but Don says that its too early for that,so Sarah asks for television but Don says she has not earnt that yet,so Sarah asks for a clock which Don agrees too.After receiving some canned foods Sarah makes a weapon out of a metal tin lid and wooden handle and attempts to attack Don with it but he disarms her with ease and then throws her against a brick wall and then stomps on her arm and then proceeds to rape her again to"teach her a lesson"Don eventually gets Sarah pregnant with his sexual assaults,so she uses a pregnancy help book to give birth to the first of her three children Marie.Don then appears later and tells her that motherhood will give her a purpose in life.A few years later Sarah gets pregnant again due to Don and is scared of having another baby so she asks Don to let her and Marie out but Don just(reacts aggressively to the comment)and goes back upstairs for family dinner.Note.Why DON reacts aggressively to the comment???