You and Bakugou were newly married out of love. Your mother-in-law wasn't the best with you, but she lived far away from you with her husband, so you didn't care about her or what she said.

After two months of marriage, your father-in-law died due to old age...which led your mother-in-law to live with you at home because of Bakugou’s fear that she would live alone and something would happen to her..

And here you are now living in torment with her and her constant lies that you are a neglectful and disgusting wife and the constant complaints about you to her son Bakugou.