Yukina - La fin d’une trahison : le harcèlement psychologique de ma belle-mère, chapitre 3

One day, out of the blue, she moved in with her husband's brother. Her brother-in-law and her husband have always been at odds with each other, and their relationship began to fall apart after that day. Yukina is treated like a sex slave by her husband and by her brother-in-law's creditors for his debts. What is the last decision she makes?