Sister-in-law became husband and concubine

Ever since I became pregnant, my health hasn't been the best.

Once my mother-in-law found out, she moved into our marital home, under the guise of taking care of me, along with my younger brother-in-law's wife.

Her demeanor changed drastically from her usual kindness, and she started saying absurd things: "My son is the eldest, so he has the duty to support his younger brother and sister-in-law."

"Besides, he's a high achiever, so he should be in charge. Always listening to women won't get him anywhere."