I have 3 sis-in-laws. This thread will bcom long if I have to write about all of them. The need of the hour is about the sis-in-law who is a twin of my husband.
My PIL fixed her marriage about 10 years ago with a guy who is a relative. He is an illiterate and nods his head to his mom's words. He is running a printing press. Her marriage was held in the year 98 and in the year 2000 she delivered a girl. She often came to my PIL's place due to harrassment by her in-laws. My in-laws worried so much that they never sent her to her husband. She has been living with her parents and brothers happily so far.
No one in my in-laws family seem to have really cared about her future. We got married in 2006. We repeated told PIL that she has to learn to live on her way and we sent her to her husband. Within a month there were few problems and she came back to us.
Now she is behaving like mad. Please help.

I would advice you to stay out of your sister in law's life and let
her make her own decisions. (unless it is somehow disrupting your marriage)

-PB

Dont meddle

she too might post saying "meddling sis in law"

Being a member of family you have rights to speak out your views..talk with ur in-laws & husband first...try to make them understand how long they will take care of her..also she is a mother of kid and kid can suffer..so ur in-laws & husband shud go to her husband...
also dont take too much pain...in-laws can take ur suggestions in negative ways and it can impact ur relation with husband & in-laws...so make sure ur safe side also.best of luck,