From what I gather , the person concerned is having a tough time with her in laws because they taunt her etc and the husband is not intervening.
I would suggest she should start psychotherapy for these adjustment problems and later her husband can also be called in for a few sessions.
Please watch for signs of depression - like isolating herself from people, hopelessness, helplessness, suicidal thoughts or plan or attempt.
In our country people brush aside these things saying it happens in all houses but in many cases this ends in serious situations and many patients come to us with suicidal attempts just because the husband would not listen and her support system was not strong and because of endless harassment.
Donot take this lightly please.
Next Steps
Consult a psychiatrist online or in person.