Esther asked him about Millie's room at the dinner party and he told her it was red, Millie's favorite color (he said this just to torture Grace, b/c she knew it was the room in the basement) and then later when Grace was able to throw Millie her birthday party and Jack had to show everyone the fake room he made for Millie, it was yellow, Millie's real favorite color. She had to quit her job, had no car, no phone, he went on their girl lunch, drove her everywhere, etc. But Esther covered for Grace b/c by now she had picked up on enough clues that he controlled and battered her, and took away her life.

She clearly didn't see him b/c he was already locked in the red room and again, would have never let Grace go anywhere alone. She then lied and told the police she saw Jack waving from the door when she picked Grace up for the airport, so they would believe he was alive the last time Grace saw him, and clear her of wrongdoing. When Esther heard he died in a red room that couldn't be opened from the inside, she put two and two together that this was the room he planned to keep Millie in.

Until that point Grace had no idea her plan worked. After a couple of days and enough fake concern to the hotel manager, police at home were contacted to check on him and found him dead. While there, she acted to the hotel people that he was coming in a few days, then started acting concerned when he didn't show up and wasn't responding to her many messages. This was all a lie, obviously, as he would never have let her go alone. After she was able to lock him in there, she went on the scheduled trip alone, telling Esther (when she called and asked for a ride to the airport) that he sent her ahead first b/c he was so upset by his first-ever court loss that he wanted a few days to regroup before joining her. So he died of dehydration after a few days. He was locked in there because he specifically designed it to not open from the inside, as his plan was to imprison and torture the sister in there. He died in the 'red room' as a result of being locked in there by Grace when she slipped him the sleeping pills in the drink and she got out of the room quicker than him when he started to get sluggish.

Jazmir wrote: 'just the ending in general'

Behind closed doors by ba paris