Mum-in-laws can be hard to take on… mine is an arranged marriage, my mom-in-law was the one who actually convinced everyone in their fam to get me as the bahu…yet she gives me hard time with her words sometimes. The best thing u can do is ignore…, dont take her words to heart or mind or i say even to ur ears. It would be nice if u stayed away from her. do ur work, be urself…dont bother about her. if she says something…, do it, dont expect her to recognise or praise u. just think u r treating an ill-women. All that matters to u is ur husband and his love, hope he understands u.
I say just dont care about her words. hope i helped.