All his wives

The main character of the thriller has an exotic name - Thursday - and a difficult life. She loves her husband very much, but she sees with him, by irony, only ... on Thursdays. Seth spends the rest of the days with two other wives, whom Thursday has never seen and does not know anything about them.
Once, erasing her husband’s things, she finds a note in her pocket with a reminder of a meeting with a woman named Hannah. Intuition suggests that Hannah is one of his wives.
Thursday did not want to violate an agreement with her husband, but still tracked down Hannah and made her friendship with her. Hannah has no idea who he is dealing with. But the closer they become, the more they reveal to each other. Once Hannah comes in bruises and it becomes obvious that this is the work of her husband. This discovery is shocking, because the set has never been cruel on Thursdays.
Who is he really and how far his wife is ready to go on other days except Thursday? Will she risk her life to recognize him “closer”?